Mastering Addition and Subtraction of Rational Numbers

When adding two negative numbers, what is the first step?

• Use the sign of the larger number

• Find the sum of the absolute values

• Convert to decimal form

• Find the difference of the absolute values

What is the result of -5 + 3?

• -8

• -2

• 2

• 8

What is the additive inverse of -3?

• -1

• 3

• -3

• 0

How do you represent a descent of 20.6 meters?

• 20.6

• -0.206

• 0.206

• -20.6

What is the depth of a submarine that descends 20.6 meters and then ascends 5.7 meters?

• -26.3 meters

• 14.9 meters

• 26.3 meters

• -14.9 meters

Convert 9 and one-half to decimal form.

• 9.2

• 9.25

• 9.5

• 9.75

Simplify: 20.25 - 9.5 + 11

• 19.75

• 21.75

• 22.75

• 20.75

What was the change in temperature from -2.5°F to 0.2°F?

• 2.3°F

• 2.7°F

• 2.9°F

• 2.5°F

Where is the shark located after swimming up 137.1 meters from -172.4 meters?

• -35.3 meters

• 35.3 meters

• -309.5 meters

• 309.5 meters

What is the result of -4.4 - 1.5 + (-5.6)?

• 11.5

• 10.5

• -10.5

• -11.5