Finding Common Denominators
+/- Fractions with Unlike Denominators
Fraction of a Number Part I
Fraction of a Number Part II
Word Problems
100

What is the common denominator for 

1/2 and 1/4 

4

100

1/3 + 1/12

5/12

100

1/2 of 20

10

100

2/3 of 36 

24

100
The distance around Aitken school is about 400 feet. If Mr. B walks 1/4 of the distance around our school, how many feet did he walk?

100 feet

200

What is the common denominator for

1/3 and 1/18

18

200

3/4 - 1/20

14/20 or 7/10

200

1/4 of 28

7

200

3/4 of 40

30

200

Mrs. Sceeles bought 45 yards of fabric from the store. She gave 1/5 of the fabric to her sister. How many yards of fabric did her sister get?

9 yards

300

What is the common denominator for

1/4 and 1/5

20

300

5/6 + 3/72

63/72

300

1/6 of 72

12

300

7/8 of 96

84

300

Mr. Graf had 650 dollars to spend on improvements at Aitken School. He wants to dedicate 2/5 of that money for indoor recess supplies. How much money will be dedicated for the supplies? 

260 dollars 

400

What is the common denominator for

1/6 and 1/42

42

400

2/5 - 1/7

9/35

400

1/3 of 17

5 2/3

400

3/15 of 105

21

400

There are 378 pounds of ice melt in the back shed at school, but the middle school ran out and asked him for at least 1/5 of the ice melt. How may pounds of icemelt will the middle school get?

75 3/5 pounds per bucket 

500

What is the common denominator for

1/12 and 1/23 

276

500

3/4 + 9/12

1 6/12 OR 1 1/2 

500

1/6 of 58

9 4/6 or 9 2/3

500

12/18 of 414

276

500

In the spring, there will be a parade that is 943 yards long. If you were to march 5/6 of the parade, how many yards will you have covered?

785 5/6 yards

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