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Q: How would you use the multiplication rule to find common denominators?

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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.

Find the lowest common multiple of the denominators and adjust the fractions accordingly

The denominators need to be the same for subtraction. Find the Least Common Denominator for both items and then subtract.

Pick two of the fractions and find the Least Common Multiple of those two denominators. Then take that number, and find the Least Common Multiple between that and the third denominator. This number will be the Least Common Denominator between the three fractions.If you don't care to find the Least common denominator, then just take the three denominators, and multiply them together.

By using least common denominators when adding and subtracting fraction you get small numbers which are easy to perform operations on. On the other hand if you deal with common denominators which are excessively large, then you will find that operations are harder to perform. The one disadvantage of using LCD is that they can occasionally be difficult to find.

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The easiest way is to simply multiply the two denominators together. For example if you have 1/2 and 1/3, the common denominator would be 6 (2X3). There may be other smaller common denominators, but unless that is what is specifically asked for then the multiplication works just fine.

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.

Multiply any two denominators together. Their product will be a common denominator of them both.

No.

Common denominators are multiples that are being used as denominators. The process to find them is the same.

By finding the lowest common multiple of the different denominators then rearranging the numerators and denominators accordingly.

You can multiply the two denominators, or you can find the least common multiple for the two denominators.

Find the least common multiple. For example, if the denominators were 6 and 7, the least common multiple would be 42.

Multiply them together.

By finding the lowest common multiple of the denominators

You need at least two denominators to find something in common between them.

To add and subtract fractions, you need common denominators. To find the common denominator, find the LCM of the denominators you wish to add or subtract.

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