Sums of Unit Fractions

Front

What is a unit fraction?

Back

A unit fraction is a fraction where the numerator is 1 and the denominator is a positive integer, such as 1/2, 1/3, or 1/10.

Front

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

Back

1/4 + 1/4 = 2/4 = 1/2.

Front

If you have 1/6 of a pizza and your friend has 1/6 of a pizza, how much pizza do you have together?

Back

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

Front

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

Back

1/5 + 1/5 = 2/5.

Front

How do you add unit fractions with the same denominator?

Back

You add the numerators and keep the same denominator. For example, 1/3 + 1/3 = (1+1)/3 = 2/3.

Front

What is the sum of 1/7 + 1/7 + 1/7 + 1/7?

Back

1/7 + 1/7 + 1/7 + 1/7 = 4/7.

Front

If Yosio has 1/5 of the crayons and David has 1/5, how many crayons do they have together?

Back

1/5 + 1/5 = 2/5.

Front

What is the sum of 1/3 + 1/3 + 1/3?

Back

1/3 + 1/3 + 1/3 = 3/3 = 1.

Front

What is a common denominator?

Back

A common denominator is a shared multiple of the denominators of two or more fractions, used to add or subtract them.

Front

How do you find a common denominator for 1/4 and 1/6?

Back

The least common multiple of 4 and 6 is 12, so the common denominator is 12.