Solving an addition problem of fractions with unlike denominators

Created by hscreighton 

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5 terms · these flashcards will show the step by step process in solving an addition problem of fractions with unlike denominators.

Create steps to solve 1/3 + 1/6

When adding fractions with unlike denominators, you must make the denominator the same to add the fraction. To make the denominator the same, you must start by finding the least common multiple (LCM) of the denominators.

How do we find the LCM?

Findinng the LCM of 3 and 6...
Multiples of 3 are 3, 6, 9, 12...
Multiples of 6 are 6, 12, 18, 24
LCM = 6

Once you find the LCM, how do you make denominators the same?

The number "6" is twice as big as "3", so to make the bottom numbers the same, we can multiply the top and the bottom of the first fraction by 2, like this:
1 x 2 = 2
_ _ _
3 x 2 = 6

What should your problem look like with same denominatiors?

2/6 + 1/6 = 3/6

solution reduced?

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

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