Show:
Adding Fractions w/ like denominators
Adding Fractions w/ unlike denominators
Subtracting Fractions w/ unlike denominators
Subtracting Fractions w/ like denominators
Lowest Common Multiple
100

2/5 + 1/5 

3/5 

100

2/6 + 3/12

7/12

100

3/2 -1/4

5/4

100

4/12 - 2/12

1/6

100

LCM: 2 and 4 

4

200

1/4 + 1/4 

1/2

200

1/2 + 3/4 

5/4 

200

8/6 - 3/4

7/12

200
12/14 - 4/14

4/7

200

LCM: 3 and 9

9

300

2/8 + 5/8 

7/8

300

3/4 + 5/3

29/12 or 2 5/12

300

7/9 - 2/7

31/63

300

40/8 - 6/8

17/4

300

LCM: 4 and 6

12

400

2/4 + 6/4 + 3/4 

11/4 

400

1/4+13/8

15/8

400

4/2 - 10/7 

4/7

400

20/15 - 18/15 

2/15

400

LCM: 2, 6 and 8

24

500

20/5 + 5/5 + 15/5 

8 

500

6/12 + 8/6

11/6

500

12/8 - 6/5

3/10

500

66/100 - 10/100

14/25

500

LCM: 2, 5, and 9

90