ZZ Add Integers Review

Which real-world situation is modeled using the number line given?

• The temperature was 5 degrees and decreased by 9 degrees.

• The temperature was -4 degrees and increased by 9 degrees.

• The temperature was 4 degrees and increased by 5 degrees.

• The temperature was 5 degrees and decreased by 4 degrees.

A person swimming dives down 14 feet to the bottom of the pool and then comes back up 6 feet. What integer represents the new location of the swimmer?

• -20

• 20

• -8

• 8

Explain how to model the problem using a horizontal number line

6 + -9

• Move 6 units to the right, then 9 units to the left.

• Move 6 units to the left, then 9 units to the right.

• Move 6 units right, then 9 more units left.

• Move 6 units right, then 9 more units right.

Evaluate.

-8 + -3

Which expression is modeled on the number line?

• -9 + 3

• -3 + 6

• -3 + -9

• -3 + -6

Which expression is modeled by the number line?

• 4 + -3

• 1 + -4

• -4 + 1

• none of these

What expression is modeled on the number line?

• 4 + -2

• 4 + -6

• -4 + 2

• -4 + 6

What is the answer to the expression modeled on the number line?

• 4

• -4

• 2

• -2

Which equation is represented by the integer chips (counters) model?

• 8 + -3 = 5

• -8 + 5 = 3

• -8 + 5 = -3

• -8 + 3 = -5

Yellow is positive and red is negative.

What equation is modeled by the counters?

• -4 + 2 = -2

• 4 + -2 = 2

• 4 + -2 = 6

• 6 + -2 = 4