Adding and Subtracting 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 denominators 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 two fractions?

Back

To find a common denominator, identify the least common multiple (LCM) of the denominators.

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

Solve: 3/4 + 3/5. What is the answer?

Back

1 7/20.

Front

Solve: 11/12 + 3/4. What is the answer?

Back

1 2/3.

Front

Solve: 4/5 + 11/15. What is the answer?

Back

1 8/15.

Front

Solve: 7/12 + 2/3. What is the answer?

Back

1 1/4.

Front

What is the process for subtracting fractions with unlike denominators?

Back

1. Find a common denominator. 2. Convert the fractions. 3. Subtract the numerators and keep the common denominator.

Front

Solve: 9/10 - 1/4 + 3/8. What is the answer?

Back

1 1/40.