Q: What is the word for fractions with different denominators?

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Dissimilar fractions have different denominators.

unlike fractions

Dissimilar fractions are fractions that have different denominators.

Dissimilar fractions.

Fractions whose denominators are different.

unlike fractions

Fractions are alike if they have the same denominators; otherwise they are different.

You use them when there are 2 fractions with different denominators.

You cannot add or subtract fractions with different denominators. If the denominators are different then you need to work with equivalent fractions.

It depends what you are doing with the fractions. If you are multiplying or dividing fraction, the denominators do not need to be the same and the calculation can be carried out immediately. If you are adding or subtracting fractions, the denominators must be the same; if you have different denominators, the fractions must first be changed into equivalent fractions with the same denominator. When the denominators are the same (or have been made the same as equivalent fractions from being different) the calculation can be carried out.

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.

To subtract fractions with like denominators, subtract the numerators , and write the difference over the denominator. Example : Find 45−25 . Since the denominators are the same, subtract the numerators.

with different denominators, just get their lcd and that will serve as they're denominator.

They are known as equivalent fractions

When adding or subtracting fractions their denominators must be the same

Equivalent fractions.

If the fractions have the same denominator, add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible. If the fractions have different denominators, find the LCM of the denominators and convert the fractions to equivalent fractions with like denominators. Then add and subtract the numerators as if the denominators weren't there and put the result over that denominator. Reduce if possible.

Because you can't add or subtract fractions that have different denominators. Making them like fractions, by multiplying so the denominators are the same, you can add and/or subtract them.

the fractions have different denominators

dissimilar

Fractions with different denominators.

Unit fractions all have the same numerators but the denominators can be different.

Yes. When multiplying and dividing fractions your denominators do not have to be the same. The denominators only haveto be the same if you are subtracting or adding them.

If the denominators are the same, subtract the numerators. If the denominators are different, convert them to equivalent fractions with a common denominator and subtract the numerators.

You find the least comon multiples of the fractions' denominators.