Examples and Exercises

Answers

Example 3.47

  1. –9⋅3

Multiply, noting that the signs are different and so the product is negative.

–27

  1. –2(–5)

Multiply, noting that the signs are the same and so the product is positive.

10

  1. 4(–8)

Multiply, noting that the signs are different and so the product is negative.

–32

  1. 7⋅6

The signs are the same, so the product is positive.

42


Example 3.49

  1. –27÷3

Divide, noting that the signs are different and so the quotient is negative.

–9

  1. –100÷(–4)

Divide, noting that the signs are the same and so the quotient is positive.

25


Try It 3.93

  1. −48
  2. 28
  3. −63
  4. 60

Try It 3.94

  1. −56
  2. 54
  3. −28
  4. 39


Try It 3.97
  1. −7
  2. 39


Try It 3.98
  1. −9
  2. 23
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