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 in fractions?

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 two fractions?

Back

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

Front

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

Back

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

Tags

CCSS.7.NS.A.1C

Front

If you have 1/4 and 2/3, what is the common denominator?

Back

The common denominator for 1/4 and 2/3 is 12.

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 reach the common denominator.

Front

What is the process for adding fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert each fraction. 3. Add the numerators. 4. Simplify if necessary.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the process for subtracting fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert each fraction. 3. Subtract the numerators. 4. Simplify if necessary.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is an example of adding fractions with unlike denominators?

Back

Example: 1/4 + 2/3 = 3/12 + 8/12 = 11/12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is an example of subtracting fractions with unlike denominators?

Back

Example: 3/4 - 1/6 = 9/12 - 2/12 = 7/12.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2