Adding and Subtracting Fractions with Unlike Denominators

Front

What is a fraction?

Back

A fraction represents a part of a whole and consists of a numerator (top number) and a denominator (bottom number).

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

What does it mean to have unlike denominators?

Back

Unlike denominators are when the bottom numbers of two or more fractions are different, making it necessary to find a common denominator to add or subtract them.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you find a common denominator for fractions?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

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

Back

The first step is to find a common denominator for the fractions.

Tags

CCSS.7.NS.A.1C

Front

What is the common denominator for 1/4 and 3/16?

Back

The common denominator is 16.

Front

What is the common denominator for 5/8 and 3/6?

Back

The common denominator is 24.

Front

How do you convert fractions to have a common denominator?

Back

Multiply the numerator and denominator of each fraction by the necessary factor to make the denominators the same.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is 8/15 - 1/5?

Back

1/3.

Tags

CCSS.7.NS.A.1C

Front

What is 4/9 - 1/12?

Back

13/36.

Tags

CCSS.7.NS.A.1C

Front

What is 3/7 + 6/14?

Back

6/7.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2