Common Denominator
9/10 - 2/10
7/10
1/2 + 1/4
3/4
1 and 3/13 + 3 and 4/13
4 and 7/13
3/4 +3/8
1 and 1/8
5/6 +9/11
about 2
2/15 + 7/15
3/5
7/10 - 3/5
1/10
5 and 4/5 - 3 and 2/5
2 and 2/5
6/7 +13/14
1 and 11/14
6 and 3/4 - 2 and 2/5
about 5
7/25 + 13/25
4/5
4/9 + 1/6
11/18
7 and 8/17 + 5 and 6/34
12 and 11/17
5 and 5/6 + 2 and 3/10
8 and 2/15
43 x 1/9
about 5
24/30 - 22/30
1/15
11/15 - 5/12
19/60
14 and 2/9 - 9 and 4/12
4 and 8/9
12 and 4/7 + 11 and 2/3
24 and 5/21
46 and 7/9 divide by 7 and 6/7
about 6 or about 7
4/48 + 17/48 + 9/48
5/8
3/8 + 4/14 + 2/7
53/56
5 and 3/7 + 8 and 1/14 + 1 and 9/21
14 and 13/14
4 and 3/5 + 7 and 13/20 + 8 and 32/40
21 and 1/20
7 and 11/15 + 8 and 9/13 - 5 and 6/17
about 12