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Mathematics: Applications and Concepts, Course 2 Interactive Chalkboard
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Example 1 Evaluate Expressions
Example 2 Evaluate Expressions
Example 3 Evaluate Expressions with Powers
Example 4 Evaluate Expressions with Powers
Example 5 Evaluate an Expression
Example 6 Use an Expression to Solve a Problem
Evaluate
Add first since 18 + 2 is in
parentheses.
Subtract 20 from 27.
Answer: 7
Evaluate
Answer: 16
Evaluate
Multiply 5 and 3.
Add 15 and 15.
Subtract 2 from 30.
Answer: 28
Evaluate
Answer: 15
Evaluate
Find the value of
Multiply.
Answer: 120,000
.
Evaluate
Answer: 9,000
Evaluate
Subtract 1 from 3 inside the
parentheses.
Find the value of
Divide.
Answer: 7
.
Evaluate
Answer: 4
Evaluate
.
Add 4 and 2.
Multiply from left to
right,
Multiply from left to
right,
Subtract from left to
right,
Add 2 and 16.
Answer: 18
Evaluate
Answer: 9
Use the table shown below. Taylor is buying two
video game stations, five extra controllers, and ten
games. What is the total cost?
Item
game station
controller
game
Quantity
2
Unit Cost
$180.00
5
$24.95
10
$35.99
number
of game
stations
cost of
game
station
number of
controllers
2
$180
5
cost of
controller
number
of
games
cost
of game
$24.95
10
$35.99
Multiply from left to right.
Add.
Check Check the reasonableness of the answer by
estimating. The cost is about (2  200) + (5  25)
+ (10  40) = 400 + 125 + 400, or about
$925. The solution is reasonable.
Answer: So, the total cost is $844.65.
Use the table shown below. Suzanne is buying
a video game station, four extra controllers,
and six games. What is the total cost?
Item
Quantity
game station
1
$180.00
controller
4
$24.95
game
6
$35.99
Answer: $495.74
Unit Cost
Click the mouse button or press the
Space Bar to display the answers.
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