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

2/15 + 1/15

1/5

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

3/12 - 1/8

1/8

Adding Mixed Numbers with like Denominators

100

4 1/6 + 9 2/6

13 3/6

200

8 1/4 + 8 2/4

16 3/4

300

8 4/6 + 4 1/6

12 5/6

400

8 1/12 + 2 7/12

10 8/12 or 10 2/3

500

10 5/12 + 8 7/12

19

Subtracting Mixed Numbers with like Denominators

100

7 3/12 - 1 1/12

6 2/12 or 6 1/6

200

11 7/8- 7 3/8

4 4/8 or 4 1/2

300

17 8/9 - 8 2/9

9 6/9

400

7 9/10 - 2 7/10

4 2/10 or 4 1/5

500

9 11/12 - 5 8/12

3 3/12 or 3 1/4

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

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

improper fraction

300

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

denominator

400

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

500

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

LCM