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Multiplying

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Multiplying & Dividing Integers Objective: 7.1.02 Essential Question: How can I multiply and divide integers? Vocabulary: (1) Integer (2) Opposite (3) Number Line (4 ... – PowerPoint PPT presentation

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Title: Multiplying


1
Multiplying Dividing Integers
2
Objective
  • 7.1.02

Essential Question
How can I multiply and divide integers?
3
Vocabulary
  • (1) Integer
  • (2) Opposite
  • (3) Number Line
  • (4) Absolute Value
  • (5) Rational Number

4
First Lets Review
  • So What Do We Remember About Adding
    Subtracting Integers

5
Multiplying Integers
  • Follow these rules
  • (1) The product of two integers with the same
    sign is positive.
  • (2) The product of two integers with different
    signs is negative.

6
Multiplying Integers
  • (1) The product of two integers with the same
    sign is positive.
  • (2) The product of two integers with different
    signs is negative.
  • () () () ()() ()
  • () () () () () ()

7
Multiplying Integers Examples
  • Example 1 Find the product of 9 x 2.
  • Example 2 Find the product of 5 x 8.
  • Example 3 Find the product of 4 x 6.
  • Example 4 Find the product of 7 x 3.

8
Multiplying Integers Word Problem
  • A construction company is starting to excavate a
    hole for a new underground parking garage. If
    the company excavates 3 feet every hour for 4
    hours, what will be the depth of the hole in
    relation to the surface?
  • ( 3ft) x 4 hours 12 feet
  • Remember that the () simply means down

9
Dividing Integers
  • Follow these rules
  • (1) The quotient of two integers with the same
    sign is positive.
  • (2) The quotient of two integers with different
    signs is negative.

10
Dividing Integers
  • (1) The quotient of two integers with the same
    sign is positive.
  • (2) The quotient of two integers with different
    signs is negative.
  • () ()
  • () ()
  • () ()
  • () ()

()
()
()
()
11
Dividing Integers Examples
  • Example 1 Find the quotient of 9 3.
  • Example 2 Find the quotient of (12) ( 6).
  • Example 3 Find the quotient of 8 4.
  • Example 4 Find the quotient of 49 7.

12
Dividing Integers Word Problem
  • A football team was penalized 60 yards in 4
    plays. Suppose the team was penalized an equal
    number of yards on each play. Write an integer
    that gives the number of yards for each penalty?
  • - 60 yards
  • 4 plays

- 15 yards/play
13
So Lets Review The Rules
  • MULTIPLICATION
  • () () () ()() ()
  • () () () () () ()

14
So Lets Review The Rules
  • DIVISION
  • () ()
  • () ()
  • () ()
  • () ()

()
()
()
()
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