Rational Numbers Review

Adding Rational Numbers

100

Add:

4.3 + 2.6

6.9

200

Add:

1/3 + 5/3

2

300

Add:

-3/8 + (-3/4)

-1 1/8

400

Add:

2 1/3 + 3 3/4

6 1/12

500

Add:

-4 1/3 + 2 2/9

-2 1/9

Subtracting Rational Numbers

100

Subtract:

5.7 - 9.3

-3.6

200

Subtract:

(-3/5) - 4/5

-7/5

300

Subtract:

4/7 - 11/14

-3/14

400

Subtract:

4 1/5 - 1 4/5

2 2/5

500

Subtract:

-5 1/6 - 3 3/4

-8 11/12

Multiplying Rational Numbers

100

Multiply:

4.5 x 6

27

200

Multiply:

-2/3 x 7/8

-7/12

300

Multiply:

26.5 x (-4.2)

-111.3

400

Multiply:

5 1/2 x 3/4

33/8 or 4 1/8

500

Multiply:

-3 5/7 x 1 3/4

-13/2 or -6 1/2

Dividing Rational Numbers

100

Divide:

0.5 ÷ 2

0.25

200

Divide:

-10/11 ÷ 9/11

-10/9 or -1 1/9

300

Divide:

-5/6 ÷ 4/3

-15/24 or -5/8

400

Divide:

6.375 ÷ 25

0.255

500

Divide:

-5  4/7 ÷ 2/7

-39/2 or -19 1/2

How-To Guide

100

Fill in the blank:

"When adding or subtracting decimals, you have to ___________ first.

Line up the decimal points.

200

Fill in the blanks:

To multiply fractions, you must have ___________.

All fraction numbers. No mixed numbers and no whole numbers. 

300

Fill in the blank:

In order to add or subtract fractions, the fractions must have __________.

The same denominator.

400

Fill in the blank:

The numbers 4 and 1/4 are called _____________.

reciprocals

500

When you divide decimals which number is NOT allowed to have a decimal in it?

Divisor