Adding & Subtracting Fractions

Adding & Subtracting Fractions with Like Denominators

1

1/6 + 4/6

5/6

2

3/4 - 1/4

1/2

3

9/10 - 7/10

1/5

4

2/12 + 4/12

1/2

5

2/15 + 1/15

1/5

Adding & Subtracting Fractions with Unlike Denominators

1

1/4 + 5/8

7/8

2

2/5 + 1/2

9/10

3

7/12 - 1/2

1/12

4

5/6 - 2/12

3/4

5

3/12 - 1/8

1/8

Adding Mixed Numbers with Unlike Denominators

1

4 1/6 + 9 2/3

13 5/6

2

8 1/4 + 8 1/2

16 3/4

3

8 1/6 + 4 1/2

12 2/3

4

8 1/12 + 2 2/3

10 3/4

5

10 5/6 + 8 2/12

19

Subtracting Mixed Numbers with Unlike Denominators

1

7 3/4 - 1 1/12

6 2/3

2

11 1/2- 7 3/8

4 1/8

3

17 8/9 - 8 2/3

9 2/9

4

7 4/5 - 2 9/10

4 9/10

5

9 1/2 - 5 8/12

3 5/6

Vocabulary for Working with Fractions

1

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

Simplified

2

12/7 is an example of an _______________. This is not in the simplest form!

improper fraction

3

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

denominator

4

Use __________ fractions after finding the LCM or common denominator before adding or subtracting. (Hint: This is the 2nd step when adding or subtracting fractions)

equivalent

5

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

LCM