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 add fractions with unlike denominators?

Back

It means to find a common denominator before adding the fractions together.

Front

How do you find a common denominator for two fractions?

Back

You can find a common denominator by identifying the least common multiple (LCM) of the two denominators.

Front

What is the least common multiple (LCM)?

Back

The LCM is the smallest number that is a multiple of two or more numbers.

Front

What is the first step in adding 7/16 + 3/8?

Back

Convert 3/8 to a fraction with a denominator of 16, which is 6/16.

Front

What is the sum of 7/16 + 3/8?

Back

The sum is 13/16.

Front

What is the first step in subtracting 1/4 - 3/12?

Back

Convert 1/4 to a fraction with a denominator of 12, which is 3/12.

Front

What is the result of 1/4 - 3/12?

Back

The result is 0.

Front

What is a good common denominator for 5/10 + 2/15?

Back

A good common denominator is 30.

Front

What is a good common denominator for 5/8 + 3/6?

Back

A good common denominator is 24.