Integers — Practice

Question 1

Evaluate: (-25) + 14 - (-6).

Accepted Answer

(-25) + 14 = -11. Then -11 - (-6) = -11 + 6 = -5.

Question 2

Find the product: (-8) x (-7) x (-2).

Accepted Answer

(-8) x (-7) = 56 (same signs give positive). Then 56 x (-2) = -112 (different signs give negative).

Question 3

Simplify using a property: (-15) x 8 + (-15) x 2.

Accepted Answer

Using the distributive property: (-15) x (8 + 2) = (-15) x 10 = -150.

Question 4

The temperature in a city is 10 C. It drops by 3 C every hour for 5 hours. What is the final temperature?

Accepted Answer

Total drop = 3 x 5 = 15 C. Final temperature = 10 - 15 = -5 C.

Question 5

Is (-2) - 3 equal to 3 - (-2)? Why or why not?

Accepted Answer

(-2) - 3 = -5, but 3 - (-2) = 5. They are NOT equal because subtraction is not commutative -- the order of the numbers matters.

Practice — Integers