Math topics

Adding fractions

To add fractions, the pieces must be the same size — same denominators. If denominators differ, rewrite using a common denominator first, then add the numerators and keep the denominator. Simplify when you can.

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Worked example

Problem. What is 2/3 + 1/3?

1. Denominators are both 3, so the pieces are the same size.
2. Add numerators: 2 + 1 = 3. Keep denominator 3 → 3/3.
3. 3/3 = 1 whole.

Answer. 1

Practice set

1. Practice 1. What is 1/5 + 2/5?

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   3/5

2. Practice 2. What is 1/4 + 1/4?

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   1/2

3. Practice 3. What is 1/2 + 1/4? (common denominator 4)

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   3/4

Related pages

• Fractions practice with hints
• Multiplying fractions
• Mixed numbers

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