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 or combined.

Front

Why do we need a common denominator when adding fractions?

Back

We need a common denominator to ensure that the fractions are expressed in the same terms, making it possible to add their numerators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

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 2/4 and 3/8?

Back

The least common denominator of 2/4 and 3/8 is 8.

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 is the least common denominator for 1/3 and 1/4?

Back

The least common denominator for 1/3 and 1/4 is 12.

Front

What is the first step when adding fractions with unlike denominators?

Back

Find a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the common denominator for adding 3/9 and 4/6?

Back

The common denominator for adding 3/9 and 4/6 is 18.

Front

What do you need to have when adding unlike fractions?

Back

You need a common denominator.

Tags

CCSS.7.NS.A.1C

Front

If the denominators are 4 and 6, what is the least common denominator?

Back

The least common denominator is 12.