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

• 7.5t 4 -26
• Solve the equations
• 2) Jimmy was diving in the ocean. He dove 6.2
  miles. Then he found a shark. He darted upward 2
  miles then fought him off. He then dived 5.12
  miles again. How many miles is he below sea
  level?
• (Mitch Crockett)
• TURN IN ANY LATE HOMEWORK!!
• Properties of Numbers Wkst., and Decimal Wkst.

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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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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)

6
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
• COME IN AND STUDY!!!

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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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HW

• Worksheet

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Exit / Closure

• Why is important to change the numerator when you
  change the denominator?

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Connect 4

1. The player with the longest hair will start.
2. That player will choose an equation to solve. The
   other player will work it to check if they get
   the right answer.
3. If you get the equation correct, mark it with a
   dry erase marker.
4. Then the next player will go.
5. The first person to get 4 in a row wins.

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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

13
Lesson

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

14
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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18
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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.

24
Lesson

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

25
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 Fractions

• 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.