Adding Fractions with Unlike Denominators

Front

What is a numerator?

Back

The top number in a fraction.

Front

What must you have to add and subtract fractions?

Back

Common denominators.

Front

What is a denominator?

Back

The bottom number in a fraction.

Front

How do you find a common denominator for two fractions?

Back

By finding the least common multiple (LCM) of the denominators.

Front

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

Back

Find a common denominator.

Front

If you have 1/4 and 1/6, what is the common denominator?

Back

The common denominator is 12.

Front

How do you convert 1/4 to have a denominator of 12?

Back

Multiply the numerator and denominator by 3 to get 3/12.

Front

How do you convert 1/6 to have a denominator of 12?

Back

Multiply the numerator and denominator by 2 to get 2/12.

Front

What is 3/12 + 2/12?

Back

5/12.

Front

What do you do after finding a common denominator and converting the fractions?

Back

Add the numerators and keep the common denominator.