Adding Unlike Fractions

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. It allows fractions to be added or compared.

Front

What must be true about the denominators in order to add fractions?

Back

All denominators must be the same.

Front

How do you find a common denominator for the fractions 1/2 and 1/3?

Back

The common denominator is 6.

Front

Rewrite the problem: 1/2 + 1/3. Then, solve.

Back

1/2 + 1/3 = 3/6 + 2/6 = 5/6.

Front

What is the first step in adding unlike fractions?

Back

Find a common denominator.

Front

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

Back

The common denominator is 12.

Front

Rewrite the problem: 3/8 + 1/4. Then, solve.

Back

3/8 + 1/4 = 3/8 + 2/8 = 5/8.

Front

What is the least common multiple (LCM) of 4 and 6?

Back

The LCM is 12.

Front

If you have the fractions 2/5 and 1/10, what is a common denominator?

Back

The common denominator is 10.

Front

Rewrite the problem: 2/3 + 1/6. Then, solve.

Back

2/3 + 1/6 = 4/6 + 1/6 = 5/6.