Add and Subtract Fractions

Front

What must you have to add and subtract fractions?

Back

Common denominators.

Front

1/4 + 5/8 = ?

Back

7/8.

Front

Subtract 9/5 - 1/4 = ?

Back

31/20.

Front

Sally is painting her house. She used 1/8 of a gallon of paint in her bathroom, and 2/6 of a gallon of paint in her bedroom. How much paint did she use in all?

Back

11/24.

Front

2/5 + 3/10 = ?

Back

7/10.

Front

What is a common denominator?

Back

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

Front

How do you find a common denominator for 1/3 and 1/4?

Back

The least common multiple of 3 and 4 is 12, so the common denominator is 12.

Front

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

Back

Find a common denominator.

Front

If you have 1/2 and you want to subtract 1/3, what do you need to do first?

Back

Find a common denominator.

Front

What is the sum of 3/4 and 1/2?

Back

5/4 or 1 1/4.