Adding Fractions with Unlike Denominators
Least Common Denominator
Simplify
Miscellaneous
100
1/4 + 2/3 = Answer in simplest form.
3/12 + 8/12 = 11/12
100
1/2 & 3/5
Least Common Denominator = 10
100

Simplify: 12/15

4/5

100
If the denominators are the same for two fractions, would you have to multiply one by the other
No, only multiply if denominators are unlike
200
True or False. 4/9 + 1/6 = 10/18
False. 8/18 + 3/18 = 11/18
200
5/12 & 2/9
Least Common Denominator = 36
200

Simplify: 8/16

1/2

200
The first thing you do when you are adding or subtracting fractions with unlike denominators.
Make the denominators the same.
300

1/2 + 3/16 = Answer in simplest form.

8/16 + 3/16 =  11/16

300
1/6 & 4/21
Least Common Denominator = 42
300

Simplify: 7/56

1/8

300

Add  3/4 & 1/5

15/20 + 4/20 = 19/20 

400
1/2 + 1/3 + 1/4 = Answer in simplest form.
6/12 + 4/12 + 3/12 = 13/12 = 1 & 1/12
400
9/10 & 5/6 & 2/3
Least Common Denominator = 30
400

Simplify: 28/36

7/9

400

TWO ways you can get two fractions with unlike denominators to have the same denominator.

1. Butterfly Method: Multiply the two denominators by one another 2. Find Least Common Denominator 

500

3/14 + 1/3 = Answer in simplest form.

9/42 + 14/42 =  23/42

500
11/14 & 17/42 & 2/3
Least Common Denominator = 42
500

Simplify: 15/40

3/8

500

The last step in the process of adding  fractions. AFTER adding.

Simplify if possible.

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