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www.khanacademy.org/math/in-sixth-grade-math/fractions-1/addition-subtraction-fractions/v/adding-and-subtracting-fractions

How to

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A

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This is a bit tricky, but you'll think it's easy once you get used to it! Let's try this: 1/2 + 1/3. The main rule of this game is that we can't do anything until the ...

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In this lesson you will learn how to

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Speedway Fractions - Learning Connections. Essential Skills. Mental Math -

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Sections: Reducing fractions, Mixed numbers and improper fractions, Multiplying
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5th grade

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Answer

To add or subtract fractions, they must have the same denominator. If they do not, make the least common multiple of all of the denominators the new denominator. After adding or subtracting, reduce your answer.

When giving the fractions like denominators, whatever number you multiply the old denominator of a fraction by, you must also multiply it by the numerator.

Sources:

See Also:
Least Common Denominators

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