7 th grade math week of 9/22/14 information from : //net.cmsdnet.net/schools/math/sld005.htm
TRANSCRIPT
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7th Grade MathWeek of 9/22/14
Information from : http://net.cmsdnet.net/schools/math/sld005.htm
http://www.mathsisfun.com/adding-decimals.html
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Monday: Bell Work
1) –7.5t + 4 = -26
2) 22.1 = 4.2h + 3.1
* Solve the equations
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2- Step Equation
... use patterns and properties to explore, develop properties and describe real-world situations represented by the multiplication or division of integers? (7.NS.2a)
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Word Wall Quiz
Match and/or Fill in the blank for each term
Words are only used one time.
For the matching – write the letter beside the number
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Fractions
Fraction is divided into 2 parts
Numerator
Denominator
The numerator (the part) is being compared to the denominator (the whole)
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Comparing Fractions
Example: which is bigger: 3/8 or 5/12 ? Convert each fraction to a decimal.
We can use a calculator (3÷8 and 5÷12)
Anyway, these are the answers I get: 3/8 = 0.375, and 5/12 = 0.4166...
So 5/12 is bigger.
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HW
Worksheet
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Exit / Closure
• Why is important to change the numerator when you change the denominator?
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Tuesday: Bell Work
1) a + 5.8 = 26.6 4.5
2) X + 2.4 = 15.4 2
Solve the equationsHave homework on desk ready to check
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Lesson
• ... solve real-world problems involving the addition, subtraction, multiplication, and/or division of rational numbers? (7.NS.3)
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Adding Fractions
Adding Fractions There are 3 Simple Steps to add
fractions:Step 1: Make sure the bottom numbers (the
denominators) are the same Step 2: Add the top numbers (the
numerators), put the answer over the denominator
Step 3: Simplify the fraction (if needed)
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Subtracting Decimals
Follows the same pattern as adding except you subtract the numerators.
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Exit / Closure
In math, why is it important to have the same denominator when adding and subtracting decimals?
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Wednesday: Bell Work
Joey, Keith, and Eli have a combined height of 7 meters. If Joey is 2.31 meters tall and Eli is 2.6 meters tall, how tall is Keith?
*Write and solve the equation. The variable cannot be in the answer.*
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Lesson
• ... solve real-world problems involving the addition, subtraction, multiplication, and/or division of rational numbers? (7.NS.3)
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Adding / Subtracting Mixed Numbers
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Subtracting Mixed Numbers
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Exit / Closure
• What is the purpose of converting mixed numbers to improper fractions?
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Thursday: Bell Work1) James works at an Indian sweet shop. He needs to fill boxes with 0.3 kilograms of coconut candy each. If he has 8 kilograms of coconut candy, how many boxes can he fill?
Write and solve the equation. The variable cannot be in the answer.*
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Lesson
• ... solve real-world problems involving the addition, subtraction, multiplication, and/or division of rational numbers? (7.NS.3)
• N2K 3
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Critical Thinking Activity
Dan worked as a volunteer for a total of 103 hours in 21 days. He worked about the same number of hours each day. Which is the best estimate of the number of hours Dan worked as a volunteer each day?
a) 3
b) 4
c) 5
d) 6
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Constructed Response Amy is in charge or ordering new computers for
her classroom. If each computer costs $1256.33 and Amy needs to order 5 computers, about how much money will Amy need?
Amy says she will need about $5,000.00 for her new computers. She shows her work:
$1256.33 rounds to $1000.00 and 1000.00 times 5 = $5,000.00
Did Amy round correctly for this situation? Defend you answers using words and examples.
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Exit / Closure
• What is the importance of checking your work in math?
• Discuss with a partner
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Friday: Bell Work1) Maneesha purchased a box of pencils for
$1.28 and gave the cashier $10.00. How much change should she get back?2) If you buy an ebook for $29.62 and download 5 songs for $1.29 each, what is the total amount you have spent?*Write and solve a 2-step equation.
***notes for Agenda
Benchmark – Monday 9/29
Ch 3 Test – Friday 10/3
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Lesson
• ... solve real-world problems involving the addition, subtraction, multiplication, and/or division of rational numbers? (7.NS.3)
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Multiplying Fractions
N x N = N
D D D
6 X 8 = 48
7 11 77
Multiply straight across
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Dividing Decimals
N ÷ N = N
D D D
*multiply the reciprocal
N x D = N
D N D
6 ÷ 8 = 48 6 x 11 = 66
7 11 77 7 8 56
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Multiplying / Dividing Mixed Numbers
Change to mixed numbers to improper fractions and then multiply or divide.
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Exit / Closure
• Tommy said that 4 + 2 x = -24 x is 14.
• Justify whether Tommy is incorrect or correct.
• ***Be ready to explain your answer to a partner.