7th Grade Rational Number Arithmetic

Addition

100

-5 + (-4)

-9

200

-8 + 8

0

300

4.5 + (-3.2)

1.3

400

-4/5 + 1/2

-3/10

500

5 + 32 + (-40)

-3

Subtraction

100

7 - (-13)

20

200

-4 - (-15)

11

300

-28 - 21

-49

400

-4.6 - (-4.7)

0.1

500

-20 - (24) - (-32)

-12

Multiplication

100

4 X (-3)

-12

200

6 X -7

-42

300

-8 X -9

72

400

(-2/3) X (-5/6)

5/9

500

4 X -0.25 X -15

15

Division

100

9 / -3

-3

200

64 / -16

-4

300

-90 / -10

9

400

-5.4 / 9

-0.6

500

75 / (-25) / 2

-1.5

Equations

100

21 + ? = -7

-28

200

? - (-5) = 27

22

300

? X 3 = -33

-11

400

-9 X ? = 81

-9

500

? / -5 = 7

-35