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7th Grade Math

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7th Grade Math Week of 9/22/14 Information from : http://net.cmsdnet.net/schools/math/sld005.htm http://www.mathsisfun.com/adding-decimals.html Monday: Bell Work 2 ... – PowerPoint PPT presentation

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Title: 7th Grade Math


1
7th Grade Math
  • Week of 9/22/14
  • Information from http//net.cmsdnet.net/schools/
    math/sld005.htm
  • http//www.mathsisfun.com/adding-decimals.html

2
Monday Bell Work
  • 1) 7.5t 4 -26
  • 2) 22.1 4.2h 3.1
  • Solve the equations

3
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)

4
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

5
Fractions
  • Fraction is divided into 2 parts
  • Numerator
  • Denominator
  • The numerator (the part) is being compared to the
    denominator (the whole)

6
Comparing Fractions
  • Example which is bigger 3/8 or 5/12 ?
  • Convert each fraction to a decimal.
  • We can use a calculator (38 and 512)
  • Anyway, these are the answers I get
  • 3/8 0.375, and 5/12 0.4166...
  • So 5/12 is bigger.

7
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8
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9
HW
  • Worksheet

10
Exit / Closure
  • Why is important to change the numerator when you
    change the denominator?

11
Tuesday Bell Work
  • 1) a 5.8 26.6
  • 4.5
  • 2) X 2.4 15.4
  • 2
  • Solve the equations
  • Have homework on desk ready to check

12
Lesson
  • ... solve real-world problems involving the
    addition, subtraction, multiplication, and/or
    division of rational numbers? (7.NS.3)

13
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)

14
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15
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16
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17
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18
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19
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20
Subtracting Decimals
  • Follows the same pattern as adding except you
    subtract the numerators.

21
Exit / Closure
  • In math, why is it important to have the same
    denominator when adding and subtracting decimals?

22
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.

23
Lesson
  • ... solve real-world problems involving the
    addition, subtraction, multiplication, and/or
    division of rational numbers? (7.NS.3)

24
Adding / Subtracting Mixed Numbers
25
Subtracting Mixed Numbers
26
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27
Exit / Closure
  • What is the purpose of converting mixed numbers
    to improper fractions?

28
Thursday Bell Work
  • 1) 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.

29
Lesson
  • ... solve real-world problems involving the
    addition, subtraction, multiplication, and/or
    division of rational numbers? (7.NS.3)
  • N2K 3

30
  • 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

31
  • 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.

32
Exit / Closure
  • What is the importance of checking your work in
    math?
  • Discuss with a partner

33
Friday Bell Work
  • 1) 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

34
Lesson
  • ... solve real-world problems involving the
    addition, subtraction, multiplication, and/or
    division of rational numbers? (7.NS.3)

35
Multiplying Fractions
  • N x N N
  • D D D
  • 6 X 8 48
  • 11 77
  • Multiply straight across

36
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
  • 11 77 7 8 56

37
Multiplying / Dividing Mixed Numbers
  • Change to mixed numbers to improper fractions and
    then multiply or divide.

38
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.
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