1. Using Grouping Symbols
EXAMPLE 2
Using Grouping Symbols
a. (14 + 6) 8 =
Add inside parentheses first.
= 160
Then multiply. b.
9 8
4 + 8 = 72
4 + 8
Evaluate numerator. 12 = 72
Evaluate denominator. = 6
Divide.

2. Using Grouping Symbols
EXAMPLE 2
Using Grouping Symbols
c [63 ( )]
= [ ]
Divide inside the innermost
set of grouping symbols. =
Divide inside brackets. =5
Divide.

3. The total cost of the visit is $91.50.
EXAMPLE 3
Using a Verbal Model
To find the total cost of the visit to the aquarium described on the previous page, you can use a verbal model to write and evaluate an expression. =
Substitute values. =
Multiply first.
= 91.50
Then add.
ANSWER
The total cost of the visit is $91.50.

4. Evaluate the expression.
GUIDED PRACTICE
for Examples 2 and 3
Evaluate the expression.
(9 – 4)
= (5)
Subtract 4 from 9 . =
Divide .
= 7

5. Evaluate the expression.
GUIDED PRACTICE
for Examples 2 and 3
Evaluate the expression.
[(11–1) ] =
3 [(10) 5]
Subtract 1 from 11 .
Divide inside the innermost set of grouping symbols.
= 3 2
= 6
Multiply.

6. Evaluate the expression.
GUIDED PRACTICE
for Examples 2 and 3
Evaluate the expression. 6.
45+19
2 8 64 =
2 8
Add 45 and 19 . 64 = 16
Multiply 2 by 8 .
= 4
Divide .

7. The total cost of the visit is $1110.
GUIDED PRACTICE
for Examples 2 and 3
7. What If? Suppose 50 students go to the aquarium and movie in Example 3. It costs $35 to park their school bus. Use a verbal model to write and evaluate an expression for the total cost of their visit. =
Substitute values. =
Multiply first.
= 1110
Then add.
ANSWER
The total cost of the visit is $1110.