Adding and Subtracting Unlike Fractions

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 are unlike fractions?

Back

Unlike fractions are fractions that have different denominators.

Tags

CCSS.3.NF.A.1

CCSS.3.NF.A.2B

Front

How do you add unlike fractions?

Back

To add unlike fractions, first find a common denominator, convert the fractions, and then add the numerators.

Tags

CCSS.7.NS.A.1C

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions.

Front

Example of finding a common denominator for 1/3 and 1/4?

Back

The least common denominator (LCD) of 3 and 4 is 12.

Front

Convert 1/3 to a fraction with a denominator of 12.

Back

1/3 = 4/12.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

Convert 1/4 to a fraction with a denominator of 12.

Back

1/4 = 3/12.

Tags

CCSS.3.NF.A.3B

CCSS.4.NF.A.1

Front

What is the first step in adding 1/3 and 1/4?

Back

Find a common denominator.

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

Front

Add 4/12 and 3/12. What is the result?

Back

4/12 + 3/12 = 7/12.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

How do you subtract unlike fractions?

Back

To subtract unlike fractions, find a common denominator, convert the fractions, and then subtract the numerators.

Tags

CCSS.7.NS.A.1C