Operations on Rational Numbers and Integers

Adding or Subtracting Rational Numbers

100

-4.4 + 1.7

-2.7

200

-2.5 - 3/4

-3.25

300

3/5 + (-7/10)

-0.1 or -1/10

400

-1/4 + 5/4

1

Multiplying Integers

100

-4 x (-6)

24

200

14 x (-2)

-28

300

-10 x 4 x (-3)

120

400

7 x (-2) x (-2)

28

Multiplying Rational Numbers

100

0.5 x (-0.5)

-0.25 or -1/4

200

-2 1/2 x 0.75

-15/8 or -1 7/8 or -1.875

300

-4.2 x -9.2

38.64

400

-4 2/3 x (-7/12)

98/36 or 2 26/36 or 2 13/18

Dividing Integers

100

9 ÷ (-3)

-3

200

-14 ÷ -7

2

300

-49 ÷ 7

-7

400

-15 ÷ -3

5