find a common denominator for all three and then add all of the numerators together and keep the same denominator
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1/6, 1/6 and 1/6
Add them together, then divide by 2.
Add them together, divide by 2.
When you want to add fractions that have different denominators, you have to convert them into fractions that do have the same denominators. So for example, how much is a half plus a third? Both of these can be converted into sixths, so one half equals three sixths, and one third equals two sixths. Three sixths plus two sixths equals five sixths. That's the answer. If you have three fractions with different denominators, the procedure is the same. Convert all three into fractions with the same denominators, then add them.
it stay the same when you subtract fractions and when you add fractions.