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 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 first step in subtracting fractions with unlike denominators?

Back

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

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

How do you add fractions once you have a common denominator?

Back

Add the numerators together and keep the common denominator the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you subtract fractions once you have a common denominator?

Back

Subtract the numerators and keep the common denominator the same.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the result of 19/20 - 3/10?

Back

13/20

Tags

CCSS.7.NS.A.1C

Front

What is the result of 7/16 + 3/8?

Back

13/16

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

What is the result of 7/8 - 1/6?

Back

17/24

Tags

CCSS.7.NS.A.1C