Operations with Rational Numbers

Integer Addition

100

-5 + 8

3

200

-12 + (-7)

-19

300

15 + (-23)

-8

400

-18 + 6 + (-4)

-16

500

-25 + 17 + (-8) + 12

-4

Integer Subtraction

100

9-5

4

200

6 - (-3)

9

300

-10 - 7

-17

400

-15 - (-9)

-6

500

4 - 18 - (-5)

-9

Decimal Operations

100

3.5 + 2.8

6.3

200

-4.2 + 6.7

2.5

300

(-2.5) × 6

-15

400

18.6 ÷ (-3)

-6.2

500

(-7.2) × (-4.5)

32.4

Fraction Operations

100

-3/4 + 1/4

-1/2

200

1/2 + 1/4

3/4

300

(-1/2) × 8

-4

400

12 ÷ (-1/3)

-36

500

(-2/3) × (-9/4)

3/2 or 1 1/2

Mixed Operations

100

(-6) × 3

-18

200

(-20) ÷ 4

-5

300

(-8) × (-7)

56

400

(-45) ÷ (-9)

5

500

(-3) × 4 ÷ (-2)

6