Least Common Denominator
1/2 and 3/5
10
1/4 + 2/3 =
11/12
4/5 - 1/3 =
7/15
What is a denominator?
The number underneath the line in a fraction
5/12 and 2/9
36
4/9 + 1/6 =
22/36
4/3 - 2/7 =
22/21
What is a numerator?
The number above the line in a fraction
1/7 and 4/8
56
3/4 + 1/9 =
31/36
3/4 - 1/9 =
23/36
What does equivalent mean?
Equal in value or same amount
9/10 and 5/6
30
1/2 + 1/3 =
5/6
6/7 - 1/2 =
5/14
What is the first step when adding or subtracting fractions with unlike denominators?
Find a common denominator
1/4 and 2/3
12
1/4 + 3/7 =
19/28
9/10 - 1/4 =
13/20
What is the second step when adding or subtracting fractions with unlike denominators?
Write equivalent fractions with your new denominator