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Q: How do you add fractions with unlike denomanators?

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Because to add fractions, the denominators must be equal.

unlike fractions

You can totally add fractions with unlike denominators. You have to first find the LCD (least common denominator) to make them the same denomintars. And then you can just simply add them. What you cannot do is add fractions with unlike denominators without changing them to fractions with like denominators. The reason being that you would be attempting to add fractions that are different sizes. 1/2 is not the same size as 1/3, so it would be like trying to add apples and oranges. You have to change them to a common size and that is the reason you have to find the least common denominator first. While you cannot add 1/2 and 1/3, you can add 3/6 and 2/6.

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Change them to like fractions and proceed.

no, to add and subtract like and unlike fractions the denominator has to be the same,

Because to add fractions, the denominators must be equal.

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.

When you want to add or subtract unlike fractions.

To add and subtract unlike fractions.

because its just one of the rules of math :)

Because that is not how addition of fractions is defined.

If the denominators are not the same, then you have to use equivalent fractions which do have a common denominator . To do this, you need to find the least common multiple (LCM) of the two denominators. To add fractions with unlike denominators, rename the fractions with a common denominator. Then add and simplify.

You look for a common denominator; convert the fractions to equivalent fractions with the denominator you found; then you do the addition itself.

When you are trying to add or subtract unlike fractions.

To get the right answer when you add or subtract unlike fractions.

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