Unit 9 Practice Problems

What is the result of the operation 4 + (-4)?

What is the result of the operation -5 + (-9)?

What is the result of the operation -5 - 7?

A model representing operations with numbers is shown. Which expression is represented by the model?

• - 2(- 4)

• - 2(4)

• (- 8) + 2(4)

• (- 8) ÷ (- 2)

Which expression is represented on the number line?

• 0 - (-8)

• -2 x 4

• -2 + (-8)

• -2 ÷ 4

Which expression is represented on the number line?

• -12 ÷ -3

• 0 - (-12)

• -3 x -4

• 3(-4)

Use the number line to represent the expression and determine the sum. 7 + (-15)

Use the number line to represent the expression and determine the sum. 5 + (-2). The sum is:

Hassan used a gift card to buy a pair of jeans for $30 and 2 pairs of socks for $7 per pair. The expression shown represents the total change in the balance of the gift card in dollars. \[ -30 + 2(-7) \] What integer represents the total change in the value of the gift card in dollars?

• -35

• -16

• -196

• -44

What is the value of the expression shown? \[ 35 - (-110) \div 5 \cdot 2 \]

• -9

• 46

• 79

• -30