Evaluate Expressions

Using the steps shown, Heather tried to simplify this expression. What was her first mistake?

• Step 1

• Step 2

• Step 3

• Step 4

Which operation should be performed first in simplifying this expression?

• addition

• division

• multiplication

• subtraction

How should parentheses be placed in this expression to represent a value of 82?

• (7 x 8) + 4 - 2

• (7 x 8) + (4 - 2)

• 7 x (8 + 4) - 2

• 7 x 8 + (4 - 2)

The Wild Things Pet Store has 4 birdcages with 6 canaries in each cage. The pet store also has a birdcage with 8 parakeets. Which expression shows the number of birds in Wild Things Pet Store?

• (4 + 6) x 8

• (4 x 6) + 8

• 4 + (6 x 8)

• 4 x (6 + 8)

A parking lot has 6 rows of cars. Each row has 15 cars. If 3 cars left the parking lot, which expression shows the number of cars in the parking lot?

• 6 + (15 - 3)

• 6 x (15 - 3)

• (6 + 15) - 3

• (6 x 15) - 3

Solve.

• 96

• 137

• 145

• 280

Evaluate each expression if a = 2 and b = 5
3 + a = _______

• 5

• 6

• 7

• 8

Evaluate each expression if a = 2 and b = 5

11 - b = _______

• 9

• 13

• 6

• 16

Evaluate each expression if a = 2 and b = 5

b x 4 = _______

• 6

• 8

• 9

• 20

Evaluate the expression if x = 14 and y = 6.

** Remember to x/÷ first if there are no parentheses.

y + 8 x 4

• 56

• 18

• 38

• 37