Adding and Subtracting Fractions w/ Unlike Denominators

Adding Fractions w/ unlike denominators

100

1/2 + 1/4=

3/4

200

1/6 + 2/3=

5/6

300

1/5 + 3/10=

5/10 OR 1/2

400

6/12 + 2/6=

14/12 OR 1 2/12 Or 1 1/6

500

 2/7 + 7/14=

  11/14

Subtracting fractions w/ unlike denominators

100

1/2 - 1/4=

1/4

200

2/3 - 1/6=

3/6 OR 1/2

300

1/5 - 1/10=

1/10

400

2/4 - 2/8=

 2/8 OR 1/4

500

4/6 - 1/12=

7/12

Adding and subtracting mixed numbers w/ unlike denominators

100

 3/4 + 2/3=

17/12  OR 1 5/12

200

1/4 + 5/12=

8/12 OR 2/3

300

2/4 + 4/16=

12/16 OR 3/4

400

3/5 - 4/15=

5/15 OR 1/3

500

2/7 - 2/21=

4/21

Vocabulary

100

What is a denominator?

The number below the line in a fraction.

200

What is a numerator?

The number above the line in a fraction.

300

What does equivalent mean?

Equal in value or the same in value.

400

What does simplify mean?

To reduce a fraction to it's simplest form or make the fraction as small as possible. 

500

What is a common denominator?

When the bottom number of the fraction is the same for both fractions.