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.

Front

How do you add fractions with unlike denominators?

Back

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

Front

What is a common denominator?

Back

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

Front

What is the first step in adding 1/2 and 2/5?

Back

The first step is to find a common denominator for 1/2 and 2/5, which is 10.

Front

Convert 1/2 to a fraction with a denominator of 10.

Back

1/2 = 5/10.

Front

Convert 2/5 to a fraction with a denominator of 10.

Back

2/5 = 4/10.

Front

What is 5/10 + 4/10?

Back

5/10 + 4/10 = 9/10.

Front

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

Back

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

Front

How do you find the sum of 2/5 and 1/4?

Back

Find a common denominator (20), convert the fractions (2/5 = 8/20, 1/4 = 5/20), then add: 8/20 + 5/20 = 13/20.