Finding Common Denominator
Find the common denominator:
2/5 and 1/7
35 or
14/35 and 5/35
What is 1/2 + 2/3?
7/6 or 1 1/6
What is 2/3 - 1/6 ?
1/2
What is 1/2 x 4/5 ?
4/10 or 2/5
What is 7 x 6?
42
Find the common denominator:
2/3 and 1/9
9 or
6/9 and 1/9
What is 2/7 + 1/4 ?
15/28
What is 4/5 - 2/3 ?
2/15
What is 2/4 x 7/8?
14/32 or 7/16
What is 8 x 9?
72
Find the common denominator:
3/6 and 1/8
24 or
12/24 and 3/24
What is 9/12 + 2/12?
11/12
What is 5/6 - 2/6 ?
3/6 or 1/2
What is 8/12 x 1/5?
8/60 or 2/15
What is 3 x 12?
36
Find the lowest common multiple between 11 and 12
132
What is 3/12 + 2/7
45/84
What is 4/6 - 4/8?
1/6
What is 5/15 x 2/3 ?
10/45 or 5/9
What is 9 x 12?
108
Find the lowest common multiple of 5 and 12
60
What is 8/12 + 8/11 ?
1 13/33
What is 1/10 - 2/20?
0
What is 3/11 * 4/11
12/121
What is 15 x 9 ?
135