Add/Subtract Fractions w/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 subtracted.

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) of two or more numbers is the smallest number that is a multiple of each of the numbers.

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

How do you add fractions with unlike denominators?

Back

Convert each fraction to an equivalent fraction with the common denominator, then add the numerators and keep the common denominator.

Front

What is the sum of 1/5 and 5/6?

Back

The sum is 43/30.

Front

What is the sum of 2/6 and 2/8?

Back

The sum is 7/12.

Front

What is the sum of 1/2, 1/3, and 1/6?

Back

The sum is 1.

Front

What is the sum of 4/8 and 1/3?

Back

The sum is 5/6.

Front

Can 15 be a common denominator for 1/3, 2/5, and 3/10?

Back

No, 15 cannot be a common denominator for these fractions.