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Least Common Denominator Worksheet

Practice finding the least common denominator (LCD) for fractions and using it to compare and order them.

Grade 4 Math FractionsLeast Common Denominator
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Includes

Fill in the Blanks2 Short AnswerMultiple Choice

Standards

CCSS.MATH.CONTENT.4.NF.A.2

Topics

mathfractionsleast common denominatorgrade 4
6 sections · Free to use · Printable
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Least Common Denominator

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Read each question carefully and follow the instructions to find the least common denominator (LCD) or compare fractions.

1. The Least Common Denominator (LCD) of 1/2 and 1/4 is  .

2. The LCD of 1/3 and 1/5 is  .

3. The LCD of 2/3 and 1/6 is  .

4. The LCD of 3/4 and 2/8 is  .

Use the LCD to compare the following fractions. Write <, >, or = in the box.

5. 1/2

1/3

1/2
1/3

6. 3/4

5/8

3/4
5/8

7. Order the following fractions from least to greatest using the LCD:

1/2, 2/3, 1/4

8. Order the following fractions from greatest to least using the LCD:

3/5, 7/10, 1/2

9. Which of the following is the least common denominator for 1/6 and 1/9?

a

6

b

9

c

18

d

36

10. Which pair of fractions has an LCD of 12?

a

1/3, 1/4

b

1/2, 1/6

c

1/3, 1/6

d

1/4, 1/8