Adding and subtracting fractions

Front

What is a fraction?

Back

A fraction represents a part of a whole and is expressed as a ratio of two integers, with a numerator (top number) and a denominator (bottom number).

Front

What does it mean to add fractions?

Back

Adding fractions involves combining two or more fractions to find a total. This often requires finding a common denominator.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, allowing them to be added or subtracted.

Front

How do you find a common denominator for 3/7 and 2/21?

Back

The least common multiple (LCM) of 7 and 21 is 21, which can be used as the common denominator.

Front

What is the sum of 3/7 and 2/21?

Back

The sum is 11/21.

Front

What is the first step in adding fractions with different denominators?

Back

The first step is to find a common denominator.

Front

How do you convert 4/6 to have a common denominator with 1/2?

Back

Convert 4/6 to 2/3, which has a common denominator of 6 with 1/2.

Front

What is the result of 4/6 - 1/2?

Back

The result is 1/6.

Front

How do you add 2/3 and 1/6?

Back

Find a common denominator (which is 6), convert 2/3 to 4/6, and then add: 4/6 + 1/6 = 5/6.

Front

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

Back

The sum is 5/6.