Answers

2016-02-15T22:20:34+08:00
Having the same denominators (number BELOW the "/") means you can just add the numerators (number above the "/")

Just copy the same denominator to the result

3     1     4     8
-- + -- + -- =  --
9     9     9     9

The answer is 8/9
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2016-02-16T19:58:49+08:00
Those are similar fractions (the denominators are just the same), so we just have to copy the denominator then simply add the numerators of the given fractions.
 \frac{3}{9} + \frac{1}{9} + \frac{4}{9} = \frac{8}{9}

8/9 can't be reduce in lower term because they don't have any common factors. So the final answer in your question is 8/9.

 Please, kindly correct me if I'm wrong. ^-^
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