Operations with Rational Numbers

Order of Operations

100

24 ÷ (-4)  - 10

-16

200

8 ÷ (-4) x (-6)² + 7

-65

300

(-5)² x 3 ÷ 5 + 9

24

400

10 x 5 - (-6)² + (-8)

6

500

(-5)³ -2 ÷ (1 - 0.5)

-129

Adding Rational Numbers

100

3.15 + 2.25

What is 5.40?

200

0.38 + (-1.2)

What is -0.82?

300

9/25 + (-17/25)

What is -8/25?

400

-5/12 + 1/12

What is -1/3?

500

-45.23 + - 13.552

-58.782

Subtracting Rational Numbers

100

8/11 - 3/11

What is 5/11 ?

200

- 4/13 - 8/13

What is -12/13 ?

300

-0.06 - (-0.86)

What is 0.8 ?

400

-10/24 - (-2/24)

What is -1/3 ?

500

The snowfall in Rochester, NY in the winter of 1999-2000 was 91.5 inches. Normal snowfall is about 76 inches per winter. How much more snow fell in the winter of 1999-2000 than is normal?

What is 15.5 inches?

Multiplying Rational Numbers

100

5(1/3)

What is 1 and 2/3 ?

200

-3.2 x 5

What is -16?

300

-1/6 (-2/3)

What is 1/9?

400

2/3 *  -6

What is -4 ?

500

-5.28 x -0.67

3.5376

Dividing Rational Numbers

100

1/4 divided by 3/8

What is 2/3?

200

-20 divided by 0.5

What is -40?

300

-15 divided by -5/8

What is 24?

400

-4.25 divided by 0.005

-850

500

0.0216 divided by -0.8

-0.027