Q:

What is 1/3 cup plus 1/3 cup?

A:

Quick Answer

Adding 1/3 cup to 1/3 cup makes 2/3 cup. Adding fractions requires that the bottom numbers, or denominators, are the same. The top numbers, or numerators, are then added together.

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What is 1/3 cup plus 1/3 cup?
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Full Answer

In the above problem, the denominators are already the same. If they are not, a common denominator must be found. For instance, before adding 1/3 cup to 1/2 cup, it is necessary to find a denominator that is divisible by both two and three. The denominator in this case is six. To make 1/3 into a fraction with a denominator of six, both numbers are multiplied by two, and to make 1/2 into a fraction with a denominator of six, both numbers are multiplied by three. The problem becomes 2/6 cup plus 3/6 cup equals 5/6 cup.

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