Common Denominators

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, allowing them to be compared, added, or subtracted.

Front

What is the least common denominator (LCD)?

Back

The least common denominator (LCD) is the smallest number that is a common multiple of the denominators of 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 2/4 and 3/8: 32, 12, 8, 24?

Back

12

Front

What must you have to add and subtract fractions?

Back

Common denominators.

Front

What is the least common denominator of 6/8 and 4/12?

Back

24

Front

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

Back

18

Front

If you have the fractions 1/3 and 1/4, what is the least common denominator you could use to subtract them?

Back

12

Front

What is the purpose of finding a common denominator?

Back

Finding a common denominator allows you to add or subtract fractions by converting them to equivalent fractions with the same denominator.

Front

Can a common denominator be larger than the denominators of the fractions?

Back

Yes, a common denominator can be larger than the original denominators.