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

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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 (38 and 512)
• 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 equations
• Have 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 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.

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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 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

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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
• 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
• 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.