Adding and Subtracting Fractions with Unlike Denominators Review

Adding Fractions with unlike Denominators

100

Solve: 1/3 + 3/5 

14/15 

200

Solve: 1/4 + 2/3

11/12

300

Solve: 3/7 + 1/4 

19/28

400

Solve: 2/9 + 7/12

29/36

500

Solve: 2/15 + 2/3

12/15 simplified to 4/5

Subtracting Fractions with unlike Denominators

100

Solve: 2/5 - 1/4

3/20

200

Solve: 2/7 - 1/4

1/28

300

Solve: 3/5 - 3/8

9/40

400

Solve:7/8 - 1/3

13/24

500

Solve: 6/10 - 1/8

19/40

Adding Mixed Numbers with Unlike Denominators

100

2 1/2 + 1 3/8

3 7/8

200

Solve: 5 1/3 + 6 2/5

11 11/15

300

Solve: 3 2/5 + 9 2/7

12 24/35

400

Solve: 1 1/7 + 4 5/6

5 41/42

500

Solve: 6 2/7 + 1 5/8

7 51/56

Subtracting Fractions with Unlike Denominators

100

Solve: 8 9/10 - 3 2/3

5 7/30 

200

Solve: 5 7/9 - 3/13

2 4/9

300

Solve: 17 5/6 - 1 3/5

16 7/30

400

Solve: 3 5/7 - 2 5/8

1 5/56

500

Solve: 19 7/12 - 19 1/5

23/60

Least Common Multiples

100

Find the least common multiple of 8 and 12

8: 8, 16, 24

12: 12, 24 

LCM= 24

200

Find the least common multiple of 5 and 8

5: 5, 10, 15, 20, 25, 30, 35, 40

8: 8, 16, 24, 32, 40 

LCM: 40

300

Find the least common multiple of 5 and 7

5: 5, 10, 15, 20, 25, 30, 35, 40, 45

7: 7, 14, 21, 28, 35 

LCM: 35 

400

Find the least common multiple of 6 and 7

6: 6, 12, 18, 24, 30, 36, 42

7: 7, 14, 21, 28, 35, 42

LCM: 42

500

Find the least common multiple of 6 and 10

6: 6, 12, 18, 24, 30

10: 10, 20, 30

LCM: 30