Rational Numbers

Rules

100

Before adding or subtracting fractions, we must ensure we have a.....

Common Denominator

200

Adding a negative number is the same as...

Subtracting

300

Subtracting a negative number is the same as...

Adding a positive

400

Once you're done adding or subtracting a fraction, you must make sure the fraction is....

Reduced

500

In order to turn a Mixed Number into an improper fraction, you must...

Multiply the Denominator by the Whole Number, and then add the numerator.

Adding

100

1/3 + 4/3 =

5/3

200

-3/4 + 2/4 =

-1/4

300

4/5 + (-2/3) =

2/15

400

-3/7 + 2/3 =

5/21

500

5/4 + (-17/12)

-1/6

Subtracting

100

7/8 - 4/8 =

3/8

200

-2/5 - 2/5 =

-4/5

300

8/9 - 10/9 =

-2/9

400

7/12 - 1/4 =

1/3

500

-2/5 - (-2/3) = 

4/15