Adding Subtracting Multiplying Rational Numbers

When you add a positive and a negative, you:

• add them and keep the sign

• subtract them and take the sign of the bigger number

Solve the problem.
27 + (-83)

• -56

• 110

• 56

• -110

-40 + 15.05

• 55.05

• 24.95

• -24.95

• 14.65

Multiply.

Determine the product: -2.14 x (5.8)

• -12.412

• 10.45

• 12.412

• -10.45

-18 ÷ (-2)

• 9

• -9

• -20

• 10

(-3 + -7) × (-5) ÷ (-2)

• -50

• 50

• 25

• -25

When multiplying or dividing a NEGATIVE and NEGATIVE number your result will be...

• POSITIVE

• NEGATIVE

• DEPENDS ON WHICH NUMBER IS LARGER.

• - 1  7/40
• 15/40
• - 1 10/40
• 17/40

−28+(−8)=

• 36

• −36

• −20

• 20