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 fractions to have a common denominator?

Back

Multiply the numerator and denominator of each fraction by the same number.

Front

What is 1/4 + 1/6?

Back

1/4 + 1/6 = 5/12.

Front

What is the process of adding fractions?

Back

Convert to common denominators, add the numerators, and keep the common denominator.

Front

What happens to the numerator when you change the denominator?

Back

You must adjust the numerator to keep the value of the fraction the same.