Fractions w/unlike Denominators

Least Common Denominators

100

What is the LEAST common denominator of 3 and 4?

12

200

What is the LEAST common denominator of 4 and 8?

8

300

What is the least common denominator of 3 and 5?

15

400

What is the LEAST common denominator of 6 and 9?

18

500

What is the LEAST common denominator of 6 and 8?

24

Common Fractions

100

Change 1/2 to a fraction with a denominator of 6

3/6

200

Change 2/3 to a fraction with a denominator of 12.

8/12

300

Change 5/9 to a fraction with a denominator of 18.

10/18

400

Change 4/6 to a fraction with a denominator of 24.

16/24

500

Change 5/7 to a fraction with a denominator of 28.

20/28

Add Fractions

100

2/3 + 1/8

19/24

200

1/2 + 5/12

11/12

300

3/5 + 1  1/4

1  17/20

400

2  1/4 + 3/8

2  5/8

500

5  5/8 + 2  3/4

8  3/8

Subtract Fractions

100

5/6 - 5/8

5/24

200

4/5 - 2/3

2/15

300

1  1/3 - 3/12

1  1/12

400

1  1/3 - 3/12

1  17/20

500

5  1/8 - 4

1  1/8

Word Problems

100

A chef bought 1  4 ⁄5 pounds of carrots. If he later bought another 2  3 ⁄6 pounds of carrots, what is the total weight of carrots he bought?

4  9/30

200

An empty bulldozer weighed 2  2 ⁄3 tons. If it scooped up 2  1 ⁄8 tons of dirt, what would be the combined weight of the bulldozer and dirt?

4  19/24

300

A package weighs 1  3/4 pounds.  If 5/6 pounds is taken out of the package, how many pounds are left in the package?

11/12

400

2  1/2 hours are spent studying math, and 1  3/5 hours are spent studying science.  How many hours were spent studying math and science?

4  1/10

500

A bag has 2  2/4 pounds of potatoes in it.  1  3/5 pounds of the potatoes were taken out.  How many pounds of potatoes are left in the bag?

9/10