Adding Fractions with Unlike Denominators
1 1
____ + ____ =
2 4
3
__
4
3 2
____ + ___ =
4 3
17
____
12
What is a denominator?
The number below the line in a fraction.
1 2
____ + ___ =
6 3
5
___
6
1 5
____ + ___ =
4 12
8
______
12
What is a numerator?
The number above the line in a fraction.
1 3
____ + ___ =
5 10
5
____
10
2 4
____ + ___ =
4 16
12
____
16
What does equivalent mean?
Equal
6 2
____ + ___ =
12 6
2
_____
12
3 4
____ - ___ =
5 15
5
____
15
What does simplify mean?
To make the fraction smaller; to put in its smallest form
2 7
____ + ___ =
7 14
11
_____
14
2 2
____ - ___ =
7 21
4
_____
21
What is a common denominator?
When the bottom number of the fraction is the same for both fractions.