whiz kid 4th grade math
TRANSCRIPT
Grade 4 MathMultiplication, Division, & Word
Problems
By Terrell Johnson
Table of Contents
1. Mental Math2. Order of Operations3. Word Problems4. Ma Frameworks
Mental Math
• Without using a piece of paper and pencil, solve the given problems.
• You have 5 Seconds to find the correct answer.
Solve
1 x 9 = ?
Answer = 9
Solve
2 x 7 = ?
Answer = 14
Solve
3 x 5 = ?
Answer = 15
Solve
2 x 9 = ?
Answer = 18
Solve
5 x 9 = ?
Answer = 45
Solve
8 x 9 = ?
Answer = 72
Solve
8 x 7 = ?
Answer = 56
Solve
7 x 6 = ?
Answer = 42
Solve
4 x 7 = ?
Answer = 28
Solve
4 x 12 = ?
Answer = 48
Solve
13 x 2 = ?
Answer = 26
Solve
11 x 5 = ?
Answer = 55
Solve
6 x 7 = ?
Answer = 42
Solve
10 x 9 = ?
Answer = 90
Solve
5 x 8 = ?
Answer = 40
Solve
7 x 7 = ?
Answer = 49
Solve
8 x 8 = ?
Answer = 64
Solve
9 x 9 = ?
Answer = 81
Solve
7 x 9 = ?
Answer = 63
Solve
0 x 9 x 1 = ?
Answer = 0
Order of Operations
PEMDAS1.Parenthesis2.Exponents3.Multiplication4.Division5.Addition6.Subtraction
Use a piece of paper and pencil if needed.
Order of Operations
4 × 3 + 13 + (12 × 9) = ?
Answer = 133
Order of Operations
4 + (16 × 10 – 15 – 35) = ?
Answer = 114
Order of Operations
(31 + 19 × 7) × 5 × 3 = ?
Answer = 2460
Order of Operations
33 + 25 × (5 + 6) + 11 = ?
Answer = 319
Order of Operations
10 × 4 – 23 – (13 + 4) = ?
Answer = 0
Order of Operations
(36 + 20 × 3 + 37) × 4 = ?
Answer = 532
Order of Operations
9 × 6 × 4 – (6 × 6) = ?
Answer = 180
Order of Operations
(1 × 10 + 5) × 1 × 10 = ?
Answer = 150
Order of Operations
2 × 6 + (28 + 16) × 1 = ?
Answer = 56
Order of Operations
(6 × 5) + 1 × 3 – 7 = ?
Answer = 26
Order of Operations
10 + 3 × 8 + (15 × 7) = ?
Answer = 139
Order of Operations
(16 + 40 – 3) × 7 – 40 = ?
Answer = 331
Order of Operations
6 × 1 + (10 × 1 + 16) = ?
Answer = 32
Order of Operations
5 × 3 × 6 × (4 + 25) = ?
Answer = 2610
Order of Operations
5 × 4 × (2 × 2 + 19) = ?
Answer = 460
Order of Operations
(13 + 30 + 22) × 1 + 16 = ?
Answer = 81
Order of Operations
3 × (4 + 6 × 9) – 1 = ?
Answer = 173
Word Problems
Solve the given problem with your partner.
Use a piece of paper and pencil if needed.
Ellen went to a garage sale to buy chairs. Each chair cost 15 dollars. How much money did Ellen spend for the 12 chairs she bought?
Answer = 180 dollars
Three-toed sloths have four legs. How many toes would 25 sloths
have?
Answer = 300 Toes
Albert has two snakes. The garden snake is 10 inches long. The boa constrictor is 7 times longer than the garden snake. How long is the boa constrictor?
Answer = 70 inches long
Albert’s cabbage patch has 12 rows of cabbage. In each row, there are 15 heads of cabbage. How many heads of cabbage does Albert have in all?
Answer = 180 heads of cabbage
Marie can bike at a speed of 12 miles an hour. How far can she
bike in 31 hours?
Answer = Marie can bike 372 miles.
Tammy drove 55 miles in one hour. At that rate, how far can she
drive in 36 hours?
Answer = Tammy can drive 1980 miles.
Jeff swims 20 laps every day. How many laps will he swim in six
weeks?
Answer = Jimmy will swim 840 laps.
Mary Beth could jump 42 times each minute. How many times could she jump in two hours?
Answer = Mary Beth could jump 5,040 times.
Rob could run 7 miles in one hour. At that rate, how far could Rob
run in one day?
Answer = Rob could run 168 miles.
It takes 4 apples to make 1 pie. How many apples does it take to
make 504 pies?
Answer = It takes 2,016 apples.
Ma FrameworksTopic : Operations4.N.10 Select and use appropriate operations (addition, subtraction, multiplication, and division) to solve problems, including those involving money.
Topic : Computation4.N.12 Add and subtract (up to five-digit numbers) and multiply (up to three digits by two digits) accurately and efficiently. (*Although this standard is appropriate for this grade-span, the state assessment program at the 3-4 grade span will test multiplication of only up to two digits by two digits at the present time.)
Ma FrameworksDomain : Operations and Algebraic ThinkingCluster : Use the four operations with whole numbers to solve problems.CCSS.Math.Content.4.OA.A.2 Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison. [Note: See Glossary, Table 2.] 4
CCSS.Math.Content.4.OA.A.3 Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
References
• www.k5learning.com• http://www.doe.mass.edu/frameworks/