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 1/6 and 1/4?

Back

The Least Common Denominator is 12.

Front

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

Back

18 could NOT be a common denominator.

Front

What is the Least Common Denominator of 1/7 and 3/6?

Back

The Least Common Denominator is 42.

Front

Find the lowest common denominator of 2/7 and 2/21.

Back

The lowest common denominator is 21.

Front

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

Back

12 could NOT be a common denominator.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

What is the relationship between the denominators of fractions and their Least Common Denominator?

Back

The denominators of fractions must be considered to find the Least Common Denominator, as it is based on their multiples.

Front

Why is it important to find the Least Common Denominator when adding or subtracting fractions?

Back

Finding the LCD allows fractions to be expressed with a common denominator, making it possible to add or subtract them.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is a multiple?

Back

A multiple of a number is the product of that number and an integer.