Adding Fractions with Unlike Denominators

Front

What is a common denominator?

Back

A common denominator is a number that can be used as a denominator for two or more fractions, allowing them to be added or compared.

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 of the fractions.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) is the smallest multiple that two or more numbers share.

Front

Find the LCM of 2 and 3.

Back

The LCM of 2 and 3 is 6.

Front

Find the LCM of 4 and 6.

Back

The LCM of 4 and 6 is 12.

Front

How do you add fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert each fraction to an equivalent fraction with the common denominator. 3. Add the numerators and keep the common denominator.

Front

Solve: 1/2 + 1/3

Back

The answer is 5/6.

Front

Solve: 1/5 + 5/6

Back

The answer is 41/30.

Front

Solve: 4/18 + 2/9

Back

The answer is 4/9.

Front

Solve: 2/6 + 1/2

Back

The answer is 5/6.