Least Common Denominator

Front

What is a Least Common Denominator (LCD)?

Back

The Least Common Denominator (LCD) 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

What is the Least Common Denominator of 1/4 and 1/6?

Back

The LCD is 12.

Front

Which of these numbers could NOT be a common denominator for 1/3 and 2/5? Options: 15, 30, 60, 90

Back

15

Front

What is the Least Common Denominator of 1/9 and 2/3?

Back

The LCD is 9.

Front

Which of these numbers could NOT be a common denominator for 2/4 and 3/8? Options: 32, 12, 8, 24

Back

12

Front

Which of these numbers could NOT be a common denominator for 1/6 and 1/4? Options: 12, 18, 24, 36

Back

18

Front

What is the purpose of finding a Least Common Denominator?

Back

Finding the LCD allows you to add, subtract, or compare fractions easily.

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

If the denominators are 5 and 10, what is the Least Common Denominator?

Back

The LCD is 10.