Fractions

LCM

100

LCM of 2 and 5

10

200

LCM of 3 and 9

9

300

LCM of 4 and 10

20

400

LCM of 6 and 7

42

500

LCM of 10 and 12

60

600

LCM of 3 and 11

33

700

LCM of 12 and 14

84

800

LCM of 15 and 25

75

LCD Conversion

100

LCD of 

1/2 and 1/3

3/6 and 2/6

200

LCD of 

1/5 and 1/6

6/30 and 5/30

300

LCD of 

1/2 and 1/7

7/14 and 2/14

400

LCD of 

1/4 and 1/6

3/12 and 2/12

500

LCD of 

1/8 and 1/12

3/24 and 2/24

600

LCD of 

1/4 and 1/9

9/36 and 4/36

700

LCD of 

1/7 and 1/10

10/70 and 7/70

800

LCD of 

1/9 and 1/15

5/45 and 3/45

Adding Simple Fractions

100

1/2 + 1/3

3/6 + 2/6 = 5/6

200

1/5 + 1/6

6/30 + 5/30 = 11/30

300

1/3 + 1/5

5/15+3/15=8/15

400

1/7+1/4

4/28+7/28=11/28

500

1/4 + 1/6

3/12 + 2/12 = 5/12

600

1/8+1/20

5/40+2/40=7/40

700

1/6 + 1/15

5/30 + 2/30 = 7/30

800

1/12 + 1/18

3/36 + 2/36 = 5/36

Adding Complex Fractions

100

1/2 + 2/3

3/6 + 4/6 = 7/6

200

2/5 + 2/6

12/30 + 10/30 = 22/30 = 11/15

300

2/3 + 4/5

10/15 + 12/15 = 22/15

400

3/7 + 3/4

12/28 + 21/28 = 33/28

500

3/4 + 5/6

9/12 + 10/12 = 19/12

600

5/8 + 3/20

25/40 + 6/40 = 31/40

700

5/6 + 2/15

25/30 + 4/30 = 29/30

800

7/12 + 11/18

21/36 + 22/36 = 43/36

Subtracting Fractions

100

5/7-3/7

2/7

200

1/2-1/5

5/10-2/10=3/10

300

1/3-1/8

8/24-3/24=5/24

400

1/4-1/9

9/36-4/36=5/36

500

3/5-5/20

12/20-5/20=7/20

600

5/9-3/4

20/36-27/36=-7/36

700

8/11-5/12

96/121-55/121=41/121

800

5/6-13/15

25/30-26/30=-1/30