Adding/ Subtracting Fractions

Steps

100

What is the 1st step when solving addition and subtraction problems with unlike denominators?

Find a common denominator.

200

What is the 2nd step when adding/subtracting fractions with unlike denominators?

Find equivalent fractions using the new denominator.

300

What is the 3rd step when adding and subtracting fractions with unlike denominators?

Add or subtract the numerators.

400

What is the 4th step when adding and subtracting fractions with unlike denominators?

Change improper fractions to mixed numbers.

500

What is the 4th step when adding and subtracting fractions with unlike denominators?

Simplify.

Mixed Numbers Unlike Denominators

100

   1 (1/4) 

 +3 (2/6)

4 (7/12)

200

3 (5/6) - 1 (1/4) =

2 (7/12)

300

15 (2/5) - 7 (1/6) =

8 (7/30)

400

5 (3/5) + 11 (1/8) =

16 (29/40)

500

3 (1/5) + 9 (1/4) =

12 (9/20)

Unlike Denominators Medium

100

3/5 - 1/7 =

16/35

200

2/4 + 3/9 =

5/6

300

5/10 - 1/3 =

1/6

400

4/5- 3/8 =

17/40

500

20/40 + 30/60 =

1

Unlike Denominators Hard

100

8/9 - 3/10 =

53/90

200

12/20 + 10/15 =

1  4/15

300

8/20 - 3/15 =

1/5

400

10/15 + 3/9 =

1

500

8/12 + 17/20 =

1  31/60