Common Denominators
Least Common denominator of 5/6 and 2/3
6
1/2 + 1/5
7/10
5 3/4 +1 1/3
7 1/12
9 1/6 - 2 3/4
6 5/12
Find the Rule:
1/9, 1/3, 5/9
Add 2/9
Least Common denominator of 2/5 and 3/10
10
5/8 + 1/4
7/8
3 4/5 + 2 3/10
6 1/10
1 1/5 -1/2
7/10
Find the Rule:
3/10, 2/5, 1/2, 3/5
Add 1/10
Least Common denominator of 7/8 and 2/3
24
2/3 + 1/2
1 1/6
6 3/4 - 1 5/8
5 1/8
6 -3 1/2
2 1/2
Find the Rule:
2 1/3, 4 7/12, 6 5/6, 9 1/12
Add 2 1/4
Least Common denominator of 7/8 and 2/9
72
2/3 - 1/4
5/12
5 1/3 + 6 1/6
11 1/2
9 - 3 7/8
5 1/8
Fill in the missing number.
Rule: Start at 5 3/4, subtract 5/8
5 3/4, 5 1/8, ______, 3 7/8
4 1/2
Least Common Denominator of 2/15 and 7/10
30
7/10 - 1/2
1/5
3 1/2 - 1 1/5
2 3/10
12 2/5 - 5 3/4
6 13/20
Rule: Start at 8/9, subtract 1/18
8/9, 5/6, 7/9, 13/18