Find the Least Common Denominator

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest number that can be a common denominator for two or more fractions.

Front

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

Back

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

Front

What is the least common denominator of 1/9 and 2/3?

Back

9

Front

What is the least common denominator of 2/7 and 2/21?

Back

21

Front

What is the least common denominator of 1/6 and 5/12?

Back

12

Front

Which of these numbers could NOT be a common denominator for 1/6 and 5/18: 6, 18, 36, 108?

Back

6

Front

What is a common denominator?

Back

A common denominator is a number that can be used as a denominator for two or more fractions.

Front

Why is it important to find the least common denominator?

Back

Finding the least common denominator is important for adding, subtracting, or comparing fractions.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) is the smallest multiple that is common to two or more numbers.

Front

How can you find the least common multiple of two numbers?

Back

To find the least common multiple, list the multiples of each number and find the smallest multiple that appears in both lists.