Common Denominator

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, making it possible to compare or perform operations on them.

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest number that is 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

Which of these numbers could NOT be a common denominator for 1/3, 2/5, and 3/10? Options: 15, 30, 60, 90

Back

15

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 least common denominator of 1/7 and 3/6? Options: 14, 21, 7, 42

Back

42

Front

What is the least common denominator of 1/4 and 1/3? Options: 4, 3, 12, 8

Back

12

Front

What is the least common denominator you could use to subtract 1/3 and 1/4? Options: 3, 4, 24, 12

Back

12

Front

Why is it important to find a common denominator?

Back

Finding a common denominator is important because it allows you to add, subtract, or compare fractions accurately.

Front

What is an example of finding the least common denominator for 1/2 and 1/3?

Back

The least common denominator for 1/2 and 1/3 is 6, since the multiples of 2 are 2, 4, 6, 8... and the multiples of 3 are 3, 6, 9... The smallest common multiple is 6.