Finding Least Common Denominators

Front

What is a denominator in a fraction?

Back

The denominator is the bottom part of a fraction that indicates how many equal parts the whole is divided into.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does 'least common denominator' (LCD) mean?

Back

The least common denominator is the smallest number that can be used as a common denominator for two or more fractions.

Front

How do you find the least common denominator of two fractions?

Back

To find the LCD, list the multiples of each denominator and find the smallest multiple that appears in both lists.

Front

Find the least common denominator for the fractions 2/5 and 3/7.

Back

35

Front

Calculate the least common denominator for the fractions 3/10 and 7/12.

Back

60

Front

What is the least common denominator of the fractions 1/4 and 3/8?

Back

8

Front

Find the least common denominator for the fractions 4/7 and 5/9.

Back

63

Front

Find the least common denominator for the fractions 1/2 and 7/9.

Back

18

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest multiple that is exactly divisible by each of the numbers in a set.

Front

How is the least common denominator related to the least common multiple?

Back

The least common denominator of fractions is the least common multiple of their denominators.