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, making it possible to compare or add them.

Front

How do you find the least common denominator (LCD) for 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 common denominator for 3/4 and 5/6?

Back

12

Front

What is the common denominator for 5/8 and 7/10?

Back

40

Front

What is the common denominator for 2/5 and 3/8?

Back

40

Front

Find the common denominator for 1/3 and 2/5.

Back

15

Front

Find the common denominator for 2/7 and 3/5.

Back

35

Front

Why is it important to have a common denominator when adding fractions?

Back

Having a common denominator allows you to combine fractions easily by ensuring they are expressed in the same terms.

Tags

CCSS.7.NS.A.1C

Front

What is the least common multiple (LCM)?

Back

The least common multiple is the smallest multiple that two or more numbers share.

Front

How can you use prime factorization to find the LCM?

Back

By breaking down each number into its prime factors and taking the highest power of each prime factor.