Multiplying

1
Multiplying Dividing Integers
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Objective

• 7.1.02

Essential Question
How can I multiply and divide integers?
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Vocabulary

• (1) Integer
• (2) Opposite
• (3) Number Line
• (4) Absolute Value
• (5) Rational Number

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First Lets Review

• So What Do We Remember About Adding
  Subtracting Integers

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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.

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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.
• () () () ()() ()
• () () () () () ()

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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.

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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.
• () ()
• () ()
• () ()
• () ()

()
()
()
()
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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.

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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
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So Lets Review The Rules

• MULTIPLICATION
• () () () ()() ()
• () () () () () ()

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So Lets Review The Rules

• DIVISION
• () ()
• () ()
• () ()
• () ()

()
()
()
()