Operations with Rational Numbers

Adding Rational Numbers

100

3.15 + 2.25

What is 5.40?

200

0.38 + (-1.2)

What is -0.82?

300

2/5 + (-17/25)

What is -7/25?

400

-5/12 + 2 3/4

What is 2 1/3 ?

Subtracting Rational Numbers

100

8/9 - 2/3

What is 2/3 ?

200

- 4/13 - 8/13

What is -12/13 ?

300

-0.06 - (-0.86)

What is 0.8 ?

400

-5/12 - (-1/6)

 What is - 1/4?

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

Evaluate 2/3 * x for x = -6

What is -4 ?

Dividing Rational Numbers

100

1/4 divided by 3/8

What is 2/3?

200

-20 divided by 0.4

What is -80?

300

-15 divided by -5/8

What is 24?

400

Emma bought 2 and 1/2 yards of cording for the trim around the edge of a square pillow. How much will she use for each side of the pillow?

What is 5/8 yard?