Adding & Subtracting Fractions with Unlike Denominators

Adding Fractions with Unlike Denominators

100

1/4 + 2/3 = 

11/12

200

4/9 + 1/6 =

*write your answer in simplest form 

11/18

300

3/4 + 1/9 =

31/36

400

1/2 + 1/3 =

5/6

500

1/4 + 3/7 =

19/28

Subtracting Fractions with Unlike Denominators

100

4/5 - 1/3 =

7/15

200

4/3 - 2/7 =

22/21 

300

3/4 - 1/9 =

23/36

400

6/7 - 1/2 =

5/14

500

9/10 - 1/4 =

*Write your answer in simplest form 

13/20

Least Common Denominator

100

1/2 and 3/5

LCD: 10

200

5/12 and 2/9

LCD: 36

300

1/7 and 4/8

LCD: 56

400

9/10 and 5/6

LCD: 30

500

1/4 and 2/3

LCD: 12

Understanding Fractions

100

If the denominators are the same for two fractions, do we have to find the common denominator?

No, we can add or subtract the fractions as is.

200

What does the denominator mean?

Equal parts the whole is divided into

300

What is the first step when adding and subtracting fractions with unlike denominators?

Rename the fractions.

400

What does the numerator mean in any fraction?

Parts of the whole that are counted

500

 5/6 x 24

What is 20

Factors Review

100

List the factors of 18

1, 2, 3, 6, 9, 18

200

List the factors of 30 

1, 2, 3, 5, 6, 10, 15, 30

300

List the factors of 21 

1, 3, 7, 21

400

List the factors of 9 

1, 3, 9

500

List the factors of 8

1, 2, 4, 8