Subtraction with Rational Numbers

2-(-6)

• 2

• 6

• 8

• -8

-2-(-7)

• 5

• -5

• 9

• -9

-6-(-6)

• 12

• -12

• 0

• 6

8-(-11)

• -3

• 3

• -19

• 19

When adding two numbers with the same sign, you ______ the numbers and _____ the sign.

• add, keep

• subtract, keep

• add, change

• subtract, change

When adding two numbers with different signs, you _______ the absolute values and keep the sign of the ______ absolute value.

• add, smaller

• subtract, greater

• add, greater

• subtract, smaller

When subtracting numbers, you _____ the _____ (also known as Keep, Change, Change).

• add, positive

• add, negative

• add, opposite

A meteorologist was monitoring the temperature outside in degrees Fahrenheit and wrote the expression 78+(−6)−5. Which statement best describes this expression? 

• The temperature started at  78∘F and increased by  6∘F. Then the temperature decreased by  5∘F.

• The temperature started at  78∘F and increased by  6∘F. Then the temperature increased by  5∘F.

• The temperature started at  78∘F and decreased by  6∘F. Then the temperature decreased by  5∘F.

• The temperature started at  78∘F and decreased by  6∘F. Then the temperature increased by 5∘F.

10+(-12)-(-13)

• -15

• 10

• 11

• 0

What is the additive inverse (opposite) of 12?

• 12

• -12