ADDING AND SUBTRACTING FRACTIONS

LEAST COMMON MULTIPLE

100

The least common multiple of 12 and 4.

12

200

The least common multiple of 4 and 5.

20

300

The least common multiple of 6 and 7.

42

400

The least common multiple of 10 and 7.

70

500

The least common multiple of 8 and 3.

24

ADDITION

100

2/5 + 1/2 = 

9/10

200

1/3 + 1/6 =

3/6 or 1/2

300

6/10 + 3/4=

27/20 or 1 7/20

400

1/3 + 11/12 =

15/12 or 1 3/12 or 1 1/4

500

3/5 + 1/9 =

32/45

IMPROPER FRACTIONS

100

Simplify 13/3.

4 1/3

200

Simplify 22/15

1 7/15

300

Simplify 33/14

2 5/14

400

Simplify 15/4

1 3/4

500

Simplify 29/17

1 12/17

SUBTRACTING

100

2/3 - 1/5 =

7/15

200

2/5 - 1/10 =

3/10

300

8/9 - 1/2 =

7/16

400

6/9 - 1/3 =

3/9 or 1/3

500

11/12 -1/3

7/12