Finding Common Denominators

Front

What is a common denominator?

Back

A common denominator is a number that is a multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

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 or subtract them accurately.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

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

Back

Find a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

In the fraction 12/15, what is the numerator?

Back

12

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What is the denominator in the fraction 3/4?

Back

4

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

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

Back

18

Front

Convert 3/4 and 2/6 to have a common denominator of 12.

Back

9/12 and 4/12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Solve: 5/6 - 3/12

Back

7/12

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the least common multiple (LCM) of 3 and 4?

Back

12

Front

How do you find the least common multiple of two numbers?

Back

List the multiples of each number and find the smallest multiple they have in common.