Adding & Subtracting Fractions

Adding & Subtracting Fractions with Like Denominators

100

1/6 + 4/6

5/6

200

3/4 - 1/4

1/2

300

9/10 - 7/10

1/5

400

2/12 + 4/12

1/2

500

13/15 + 12/15

5/3

Adding & Subtracting Fractions with Unlike Denominators

100

1/4 + 5/8

7/8

200

2/5 + 1/2

9/10

300

7/12 - 1/2

1/12

400

5/6 - 2/12

3/4

500

11/12 - 3/8

13/24

Adding & Subtracting improper fractions

100

9/6 + 6/3

7/2

200

- 8 /4 + 9/2

5/2

300

16/3 - 6/5

62/15

400

19/11 + 4/3

101/33

500

23/2 - 43/5

29/10

Vocabulary for Working with Fractions

100

Answers must be ___________. (Hint: This is the last step you should always complete when working with fractions.)

Simplified

200

Is the top number of a fraction

numerator

300

Fractions must have the same _________ before adding or subtracting. (Hint: This is the 1st step when adding or subtracting fractions)

denominator

400

When the denominators of two or more fractions are the same, it is called the

Common denominator

500

What is used as the common denominator when adding and subtracting fractions? 

LCM