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# How do you find least common denominators of odd numbers?

Updated: 4/11/2024

Wiki User

11y ago

The same as any other set of numbers. Example 1/35 and 1/45

Factor them.

5 x 7 = 35

3 x 3 x 5 = 45

Combine the factors, eliminating duplicates.

3 x 3 x 5 x 7 = 315, the LCD

Wiki User

11y ago

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Q: How do you find least common denominators of odd numbers?
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Find the least common multiple. For example, if the denominators were 6 and 7, the least common multiple would be 42.

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You first find equivalent fractions whose denominators are a common multiple of the different denominators. Teachers like you to use the least common denominator: that is not necessary although it can result in your working with smaller numbers and so make things easier.

### What way is subracting fractions with unlike denominators like adding fractions with unlike denominators?

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.

### Discuss the possible advantages and disadvantages of using least common denominators when adding and subtracting fractions?

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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You need at least two denominators to find an LCD.

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