primary 3/4 mathematics workshop for parents 14 april 2012 endeavour primary school mathematics...
TRANSCRIPT
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Primary 3/4 Mathematics
WorkshopFor Parents
14 April 2012
Endeavour Primary SchoolMathematics Department 2012
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Workshop Outline
• Introduction to Problem-Solving• Model Method• 3 Different types of Models• 4 different Heuristics• Format of assessment
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Problem-solving Approach
1. Understand the Problem (Understand)
2. Devise a Plan (Plan)3. Carry out the Plan (Do)4. Review and discuss the solution
(Check)
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Problem-solving Approach
1. Understand the Problem (Understand)•Read to understand. •If at first not clear, read again. •Still don’t get it? Read chunk by chunk.
•Explain the question in another way.•Use visualisation tool – model, timeline, diagrams, table etc.
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Problem-solving Approach
2. Devise a Plan (Plan)•Have I seen a similar or related
question before?•Do I have a ready plan? •Do I have all the data? What data is
missing?•Can I find the missing data?•Can I use a smaller number to try first? •Use a heuristics?
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Problem-solving Approach
3. Carry out the Plan (Do)•Are all my steps accurate?•Are there traps I need to be alert of?
•Have I used all the data given? •Do my steps make sense?
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Problem-solving Approach
4. Review and discuss the solution (Check)
•Does the answer make sense?•Did I answer the question?•Could this problem be solved in a simpler way?
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Model Method
Draw a diagram
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Why Model Drawing?• Visual representation of details
–Majority of our children are visual learners
• Helps children plan the solution steps for solving the problem– Useful in fractions, ratio &
percentage
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• Teaches mathematical language
• Provides foundation for algebraic understanding
• Empowers students to think systematically and master more challenging problems
Why Model Drawing?
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Model Drawing does NOT
•Work in every problem
•Specify ONE RIGHT model
•Specify ONE RIGHT operation
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Concrete-Pictorial-Abstract Approach
Concrete – Manipulative
s:
Base-Ten Blocks
Pictorial - Models:
100
30 ?
Abstract – Symbols:
100 – 30 = 70
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4 + 2 = 6
Concrete-Pictorial-Abstract Approach
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Types of Models1. Part-whole model
a) Whole Numbers b) Fractions
2. Comparison Modela) Comparing 2 itemsb) Comparing 3 itemsc) Other Comparison Models
3. Before-After Model a) Total unchanged
b) Total changed
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1. Part-whole Model
•Find value of unknown part• Find value of whole
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Part-whole Model: Whole Numbers
Calvin earns $2000 every month. He pays $300 for food. He also spends $200 on his car, $500 on housing and saves the rest. How much does he save every month?
Calvin earns $2000 every month. He pays $300 for food. He also spends $200 on his car, $500 on housing and saves the rest. How much does he save every month?
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Part-whole Model: Whole Numbers
Calvin earns $2000 every month. He pays $300 for food. He also spends $200 on his car, $500 on housing and saves the rest.. How much does he save every month?
$300 $200
car
$500
food housing
?
savings
$2000
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$300 $200
car
$500
food housing
?
$2000
saving
Used $300 + $200 + $500= $1000
He saves $1000 every month.
Savings $2000 - $1000= $1000
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How can we check if $1000 is a reasonable
answer?What is another way to
solve this problem?
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Part-whole Model: Whole Numbers
Qi Ying bought some sweets. She ate half of them and gave 5 sweets to Joy. She had 7 sweets left. How many sweets did Qi Ying buy?
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Part-whole Model: Whole Numbers
Qi Ying bought some sweets. She ate half of them and gave 5 sweets to Joy. She had 7 sweets left. How many sweets did Qi Ying buy?
?
Ate
1 unit (half)
5 (Joy) 7 (Left)
1 unit (half)
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Part-whole Model: Whole Numbers?
Ate
1 unit
5 (Joy) 7 (Left)
1 unit
1 unit 5 + 7= 12
Qi Ying bought 24 sweets.
2 units 2 × 12= 24
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How can we check if ‘24 sweets’ is a reasonable
answer?What is
another way of
representing this problem?
? 5 + 7× 2
÷ 2
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Part-whole Model: Fractions
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Part-whole Model: Fractions
? girls24 boys
2 units 24
1 unit 24 ÷ 2
= 12
There are 12 girls.
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How can we check if the answer is reasonable?
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Part-whole Model: Fractions
¼ of the fish in an aquarium are goldfish. There are 4 more guppies than goldfish in the aquarium. The remaining 16 fish are carps. How many fish are there in the aquarium?
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¼
Part-whole Model: Fractions
¼ of the fish in an aquarium are goldfish. There are 4 more guppies than goldfish in the aquarium. The remaining 16 fish are carps. How many fish are there in the aquarium?
¼
16 carps
¼
goldfishguppies
?
¼ 2 units 4 + 16
4 units 2 × 20 = 40
There are 40 fish.
= 20 4
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How can we check if the answer is reasonable?
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2. Comparison Model
• Find total sum given between difference and value of an item
• Find value of an item given difference and sum
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Comparison Model: 2 items
Sven collected 3426 stamps. He collected 841 fewer stamps than Jerome. How many stamps did they collect?
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Comparison Model: 2 items
Sven collected 3426 stamps. He collected 841 fewer stamps than Jerome. How many stamps did they collect?
Who has more?
3426Sven
841
fewer
?
Jerome
Whose bar should be longer?
?
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Jerome 3426 + 841= 4267
They collected 7693 stamps.
Total 3426 + 4267= 7693
3426Sven
841
fewer
?
Jerome?
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How can we check if ‘7693 stamps’ is a reasonable
answer?What is another way to
solve this problem?
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Comparison Model: 2 items
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Comparison Model: 2 items
Smaller ¼
?
Larger
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2 units
1 unit
Smaller ¼
?
Larger
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How can we check if the answer is reasonable?
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Comparison Model: 3 items
Kyle, Siti and Alice have a total of 290 stickers. Kyle has twice as many stickers as Siti. Alice has 50 stickers more than Siti. How many stickers does Alice have?
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Comparison Model: 3 items
Kyle, Siti and Alice have a total of 290 stickers. Kyle has twice as many stickers as Siti. Alice has 50 stickers more than Siti. How many stickers does Alice have?
Siti
Kyle
Alice
290
50 Note how ‘50’ is represented.
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Alice has 110 stickers.
4 units 290 – 50= 240
1 unit 240 ÷ 4= 60
Siti
Kyle
Alice
290
50
Let Siti have x stickers.Kyle 2xAlice x + 504x + 50 = 2904x = 240x = 6060 + 50 = 110
Alice 60 + 50= 110
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Comparison Model: 3 items
Kyle, Siti and Alice have a total of 270 stickers. Kyle has thrice as many stickers as Siti. Alice has half as many stickers as Siti. How many stickers does Siti have?
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Comparison Model: 3 items
Kyle, Siti and Alice have a total of 270 stickers. Kyle has thrice as many stickers as Siti. Alice has half as many stickers as Siti. How many stickers does Siti have?
Siti
Kyle
Alice
270
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Siti
Kyle
Alice
270
1 unit
2 units
Siti has 60 stickers.
270 ÷ 9
30 x 2= 60
2709 units
= 30
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How can we check if the answer is reasonable?
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Other Comparison Models
2 files and 3 pens cost $18 altogether. A file costs 3 times as much as a pen. Find the cost of 1 file.
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Other Comparison Models
2 files and 3 pens cost $18 altogether. A file costs 3 times as much as a pen. Find the cost of 1 file.
Pens
Files
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Other Comparison Models
2 files and 3 pens cost $18 altogether. A file costs 3 times as much as a pen. Find the cost of 1 file.
Pens
Files$18?
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2 files and 3 pens cost $18 altogether. A file costs 3 times as much as a pen. Find the cost of 1 file.
Pens
Files$18
9 units
1 unit
1 file costs $6.
$18
$18 ÷ 9 = $2
3 units $2 x 3 = $6
?
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Other Comparison Models
2 crystal vases and 3 plates cost $161. The cost of 1 plate is half the cost of 1 vase.
What is the cost of 1 vase?
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Other Comparison Models
2 crystal vases and 3 plates cost $161. The cost of 1 plate is half the cost of 1 vase.
What is the cost of 1 vase?
Vases
Plates
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Other Comparison Models
2 crystal vases and 3 plates cost $161. The cost of 1 plate is half the cost of 1 vase.
What is the cost of 1 vase?
Vases
Plates$161?
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2 crystal vases and 3 plates cost $161. The cost of 1 plate is half the cost of 1 vase. What is the cost of 1 vase?
Vases
Plates$161
7 units
1 unit
1 vase costs $46.
$161
$161 ÷ 7 = $23
2 units $23 x 2 = $46
?
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3. Before and After Model
• Total unchanged• Total changed
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Before and After (total unchanged)
Alan
Ben558
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Alan and Ben had 558 cards altogether. Alan gave of his cards to
Ben. After that, Ben had twice the number of cards as Alan.
How many cards did Ben have at first?
Alan
Ben558
4
1
9 units
1 unit
Ben had 310 cards at first.
558
558 ÷ 9 = 62
5 units 62 x 5 = 310
?
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Before and After (Total Changed)Alice and Betty had the same amount of money each. After Alice spent $120 and Betty spent $45, Betty had twice as much money as Alice. How much money did each girl have at first?
Alice
Betty
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Before and After (Total Changed)
Alice
Betty
1 unit
1 unit 1 unit $45
Alice and Betty had the same amount of money each. After Alice spent $120 and Betty spent $45, Betty had twice as much money as Alice. How much money did each girl have at first?
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Alice and Betty had the same amount of money each. After Alice spent $120 and Betty spent $45, Betty had twice as much money as Alice. How much money did each girl have at first?
Alice
Betty
1 unit
1 unit 1 unit $45
?
1 unit
Each girl had $195 at first.
$120 - $45 = $75
$75 + $120 = $195
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Alice and Betty had the same amount of money each. After Alice spent $120 and Betty spent $45, Betty had twice as much money as Alice. How much money did each girl have at first?
Alice
Betty
1 unit
1 unit 1 unit $45
?
1 unit
Each girl had $195 at first.
$120 - $45 = $75
$150 + $45 = $195
2 units $75 x 2 = $150
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Before and After (Total Changed)There was an equal number of male and female passengers in a train at first. After 193 male passengers and 46 female passengers alighted, there were 4 times as many female passengers as male passengers left in the train. How many male passengers were in the train at first?
Male
Female
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Before and After (Total Changed)There was an equal number of male and female passengers in a train at first. After 193 male passengers and 46 female passengers alighted, there were 4 times as many female passengers as male passengers left in the train. How many male passengers were in the train at first?
Male
Female
1 unit
1 unit 1 unit 461 unit 1 unit
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Before and After (Total Changed)There was an equal number of male and female passengers in a train at first. After 193 male passengers and 46 female passengers alighted, there were 4 times as many female passengers as male passengers left in the train. How many male passengers were in the train at first?
Male
Female
1 unit
1 unit 1 unit 461 unit 1 unit
?
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Male
Female
1 unit
1 unit 1 unit 46
3 units
There were 242 male passengers at first.
193 - 46 = 147
147 ÷ 3 = 49
1 unit 1 unit
There was an equal number of male and female passengers in a train at first. After 193 male passengers and 46 female passengers alighted, there were 4 times as many female passengers as male passengers left in the train. How many male passengers were in the train at first?
?
1 unit
49 + 193 = 242
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Other Heuristics1. Work Backwards
2. Guess and Check
3. Make a Systematic List
4. Make a Table
Is model drawing the only method?No!
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Work Backwards Find the missing number.
? 108 54 50- 4÷ 2x 3
+ 4x 2÷ 3
108 ÷ 3 = 36
The missing number is 36.
50 + 4 = 54
54 x 2 = 108
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Work BackwardsA train carrying some passengers left Station A. At Station B, 7 passengers boarded.At Station C, half of the passengers alighted. At Station D, 8 passengers alighted.As the train left Station D, there were 28 passengers on the train. How many passengers were on the train when it left Station A?
28÷2+ 7 - 8
?A
B C D
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A train carrying some passengers left Station A. At Station B, 7 passengers boarded.At Station C, half of the passengers alighted. At Station D, 8 passengers alighted.As the train left Station D, there were 28 passengers on the train. How many passengers were on the train when it left Station A?
65 passengers were on the train when it left Station A.
28 + 8 = 36
72 36 28÷2+ 7 - 8
?
36 x 2 = 72
72 – 7 = 65
AB C D
+ 8x 2- 7
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Work BackwardsJohn took 50 minutes to wash his car and another 1 h 40 min to polish it. He finished washing and polishing his car at 2 pm. At what time did he start washing his car?
2pm+ 50 min + 1h 40 min
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John took 50 minutes to wash his car and another 1 h 40 min to polish it. He finished washing and polishing his car at 2 pm. At what time did he start washing his car?
He started washing his car at 11.30 am.
? 12.20pm 2pm- 1h 40 min- 50 min
12.20 pm 11.30 am
- 50 min
2 pm 1 pm 12.20 pm
- 40 min- 1 h
+ 50 min + 1h 40 min
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Guess and Check (1)
At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycles, how many bicycles are there at the park?
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Guess and Check (1)
At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycles, how many bicycles are there at the park?
![Page 73: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/73.jpg)
Guess and Check (1)
At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycles, how many bicycles are there at the park? Conditions stated in the
question:1)Total vehicles: 252)Total wheels: 553)More bicycles than tricycles.
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At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycle, how many bicycles are there at the park?
Guess No. of bicycles(more)
No. of bicycle wheels(no. x 2)
No. of tricycles(fewer)
No. of tricycle wheels(no. x 3)
Total number
of wheels
(55)
Check
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At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycle, how many bicycles are there at the park?
Guess No. of bicycles(more)
No. of bicycle wheels(no. x 2)
No. of tricycles(fewer)
No. of tricycle wheels(no. x 3)
Total number
of wheels
(55)
Check
1 15 15 x 2 = 30
25 ‒ 15 = 10
10 x 3 = 30
30 + 30 = 60
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At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycle, how many bicycles are there at the park?
Guess No. of bicycles(more)
No. of bicycle wheels(no. x 2)
No. of tricycles(fewer)
No. of tricycle wheels(no. x 3)
Total number
of wheels
(55)
Check
1 15 15 x 2 = 30
25 ‒ 15 = 10
10 x 3 = 30
30 + 30 = 60
2 17 17 x 2 = 34
25 ‒ 17= 8
8 x 3 = 24
34 + 24 = 58
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At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycle, how many bicycles are there at the park?
Guess No. of bicycles(more)
No. of bicycle wheels(no. x 2)
No. of tricycles(fewer)
No. of tricycle wheels(no. x 3)
Total number
of wheels
(55)
Check
1 15 15 x 2 = 30
25 ‒ 15 = 10
10 x 3 = 30
30 + 30 = 60
2 17 17 x 2 = 34
25 ‒ 17= 8
8 x 3 = 24
34 + 24 = 58
3 20 20 x 2 = 40
25 – 20 = 5
5 x 3 = 15
40 + 15 = 55
There are 20 bicycles at the park.
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At a park, there are 25 bicycles and tricycles. These vehicles have a total of 55 wheels. If there are more bicycles than tricycle, how many bicycles are there at the park?
Method 1: Guess and Check
Method 2: Supposition
Suppose all the vehicles are bicycles, the number of wheels
But there are 55 wheels altogether.
55 ‒ 50 = 5 extra wheels
Each tricycle has 1 wheel more than a bicycle, 5 ÷ 1 = 5 There are 5 tricycles.
25 ‒ 5 = 20
There are 20 bicycles at the park.
2 x 25 = 50
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Guess and Check (2)
Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
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Guess and Check (2)
Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
![Page 81: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/81.jpg)
Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
Guess No. of 10¢
coins(more)
Value of 10¢
coins(no. x 10¢)
No. of 20¢
coins(fewer)
Value of 20¢ coins
(no. x 20¢)
Total value
($3.40)
Check
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Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
Guess No. of 10¢
coins(more)
Value of 10¢
coins(no. x 10¢)
No. of 20¢
coins(fewer)
Value of 20¢ coins
(no. x 20¢)
Total value
($3.40)
Check
1 20 $2 3 $0.60 $2.60 ×
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Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
Guess No. of 10¢
coins(more)
Value of 10¢
coins(no. x 10¢)
No. of 20¢
coins(fewer)
Value of 20¢ coins
(no. x 20¢)
Total value
($3.40)
Check
1 20 $2 3 $0.60 $2.60 ×
2 13 $1.30 10 $2 $3.30 ×
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Sue has 23 coins. Some are 10¢ coins and the others are 20¢ coins. She has more 10¢ coins than 20¢ coins. The total value of the coins is $3.40. How many 20¢ coins are there?
Guess No. of 10¢
coins(more)
Value of 10¢
coins(no. x 10¢)
No. of 20¢
coins(fewer)
Value of 20¢ coins
(no. x 20¢)
Total value
($3.40)
Check
1 20 $2 3 $0.60 $2.60 ×
2 13 $1.30 10 $2 $3.30 ×
3 12 $1.20 11 $2.20 $3.40
There are 11 20¢ coins .
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Make a Systematic List
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
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Make a Systematic List
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
![Page 87: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/87.jpg)
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left 6 3 short
![Page 88: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/88.jpg)
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left5 5 + 5 = 10
10
15
20
25
30
35
40
45
50
6 3 short
![Page 89: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/89.jpg)
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left5 5 + 5 = 10
10 15
15 20
20 25
25 30
30 35
35 40
40 45
45 50
50 55
6 3 short
![Page 90: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/90.jpg)
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left5 5 + 5 = 10
10 15
15 20
20 25
25 30
30 35
35 40
40 45
45 50
50 55
6 3 short6 6 ‒ 3 = 3
12
18
24
30
36
42
48
54
60
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Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left5 5 + 5 = 10
10 15
15 20
20 25
25 30
30 35
35 40
40 45
45 50
50 55
6 3 short6 6 ‒ 3 = 3
12 9
18 15
24 21
30 27
36 33
42 39
48 45
54 51
60 57
![Page 92: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/92.jpg)
Mr John has some stickers. If he gives each child 5 stickers, he will have 5 stickers left. If he gives each child 6 stickers instead, he will have 3 stickers short. How many stickers does he have?
5 5 left5 5 + 5 = 10
10 15
15 20
20 25
25 30
30 35
35 40
40 45
45 50
50 55
6 3 short6 6 ‒ 3 = 3
12 9
18 15
24 21
30 27
36 33
42 39
48 45
54 51
60 57
Mr John has 45 stickers.
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Make a Table
Benny, Cindy, David and Evelyn give picture cards to one another.Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn. David gives Benny 12 cards. Who has fewer picture cards in the end than before?
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Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBennyCindyDavidEvelyn
![Page 95: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/95.jpg)
Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 19Cindy 19DavidEvelyn
![Page 96: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/96.jpg)
Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 19Cindy 19 15David 15 Evelyn
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Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 19Cindy 19 15David 15 + 3Evelyn 3
![Page 98: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/98.jpg)
Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 19Cindy 19 15David 15 + 3 3Evelyn 3 3
![Page 99: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/99.jpg)
Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 12 19Cindy 19 15David 15 + 3 3 + 12Evelyn 3 3
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Benny, Cindy, David and Evelyn give picture cards to one another. Benny gives Cindy 19 cards.Cindy gives David 15 cards.Evelyn gives David 3 cards but David returns them to Evelyn.David gives Benny 12 cards. Who has fewer picture cards in the end than before?
Receives Gives ResultBenny 12 19 Gives moreCindy 19 15 Receives moreDavid 15 + 3 = 18 3 + 12 = 15 Receives moreEvelyn 3 3 No change
Benny has fewer picture cards than before.
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Make a Table (2)
In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole number less than 10 cannot be a score of this game?
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Make a Table (2)
In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole numbers less than 10 cannot be a score of this game?
![Page 103: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/103.jpg)
In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole number less than 10 cannot be a score of this game?
X 1 2 3 4 5 6
1
2
3
4
5
6
![Page 104: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/104.jpg)
In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole number less than 10 cannot be a score of this game?
X 1 2 3 4 5 6
1
2
3
4
5 15
6
![Page 105: Primary 3/4 Mathematics Workshop For Parents 14 April 2012 Endeavour Primary School Mathematics Department 2012](https://reader035.vdocuments.mx/reader035/viewer/2022062517/56649edf5503460f94befc49/html5/thumbnails/105.jpg)
In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole number less than 10 cannot be a score of this game?
X 1 2 3 4 5 6
1 1 2 3 4 5 6
2 2 4 6 8 10 12
3 3 6 9 12 15 18
4 4 8 12 16 20 24
5 5 10 15 20 25 30
6 6 12 18 24 30 36
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In a game, two dice are thrown and the two numbers shown are multiplied to give a score. What whole number less than 10 cannot be a score of this game?
X 1 2 3 4 5 6
1 1 2 3 4 5 6
2 2 4 6 8 10 12
3 3 6 9 12 15 18
4 4 8 12 16 20 24
5 5 10 15 20 25 30
6 6 12 18 24 30 36
The score cannot be 7.
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Format of Math Paper
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P5/P6 Math Exam Paper Format
P2 – P4 P5 - P6
MCQ 20 Qns – 40 marks
15 Qns – 20 marks
SAQ 20 Qns – 40 marks
15 Qns – 20 marks
Word Problems
5 Qns – 20 marks
18 Qns – 60 marks
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P5/P6 Math Exam Paper Format
• Paper 1 - MCQ and SAQ • Paper 2 - a combination of 2, 3, 4 and 5
marks word problems
• Paper 1 to be completed in 50 minutes without calculator
• Paper 2 to be completed in 100 minutes with calculator
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Challenges due to Paper format
• Paper 1 to be completed within 50 minutes (30 questions – less than 2 minutes per question)
• Paper 2 – focuses on thinking skills as well as heuristics
• Culture shock in P5 for pupils
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Changes to P3 and P4 Format
• 2012 – P3 and P4 SA2 Papers Section C total marks changed from 20 to 30.
• 2013 – P4 SA1 and SA2 Papers Section C total marks changed from 30 to 40.
• Heuristics and thinking skills come into play more.
• Concept and syllabus becomes basic skills.
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Thank You