Exercise 34 Page 19

Practice makes perfect

a Let's simplify this expression. Remember that the absolute value of a negative number is positive.

|- 100|-98

|-100|=100

100-98

Subtract term

The expression evaluates to 2.

b This time, we need to simplify the expression inside the absolute value before we remove it.

5|2-8|

Subtract term

5|- 6|

|-6|=6

5* 6

The expression simplifies to 30.

c Here, we need to calculate both absolute values before we can add the terms.

|- 13|+|0|

|-13|=13

13+|0|

|0|=0

13+0

Add terms

The expression simplifies to 13.

d Just as in Part B, we need to simplify the expression inside the absolute value before we remove it.

14-|- 10+3|

Add terms

14-|- 7|

|-7|=7

14-7

Subtract term

The expression evaluates to 7.

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