Adding 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).

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.

Front

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

Back

The least common denominator (LCD) of 1/3 and 1/4 is 12. You can convert both fractions to have 12 as the denominator.

Front

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

Back

1/4 = 3/12.

Front

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

Back

1/3 = 4/12.

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.

Front

What is the sum of 3/8 and 1/4?

Back

3/8 + 1/4 = 5/8.

Front

What is the sum of 5/6 and 2/6?

Back

5/6 + 2/6 = 1 and 1/6.

Front

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

Back

1/3 + 1/4 = 7/12.

Front

What is the sum of 2/5 and 1/4?

Back

2/5 + 1/4 = 13/20.