Adding 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 compared.

Front

How do you find a common denominator for 1/5 and 5/6?

Back

The least common multiple (LCM) of the denominators 5 and 6 is 30, which can be used as a common denominator.

Front

What is the first step to add fractions with unlike denominators?

Back

Find a common denominator for the fractions.

Front

If Drew ate 1/3 of a cake and 2/5 of the cake, how do you add these fractions?

Back

Convert both fractions to have a common denominator (15), then add: 5/15 + 6/15 = 11/15.

Front

What is the sum of 2/3 and 5/12?

Back

To add 2/3 and 5/12, convert 2/3 to 8/12, then add: 8/12 + 5/12 = 13/12 or 1 1/12.

Front

What is the process to subtract fractions with unlike denominators?

Back

Find a common denominator, convert the fractions, and then subtract the numerators.

Front

How do you convert 1/3 and 1/5 to a common denominator?

Back

The common denominator is 15. Convert: 1/3 = 5/15 and 1/5 = 3/15.

Front

What fraction of a bag is left if you give away 1/3 and 1/5?

Back

You give away 8/15 of the bag, so 1 - 8/15 = 7/15 is left.

Front

What is the least common multiple (LCM) of 5 and 6?

Back

The LCM of 5 and 6 is 30.

Front

How do you add 1/4 and 1/6?

Back

Find a common denominator (12), convert: 1/4 = 3/12 and 1/6 = 2/12. Then add: 3/12 + 2/12 = 5/12.