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Having a common denominator makes it easier to add or subtract fractions. You can also convert fractions to decimals and then do the addition or subtraction but that is really the same thing as having a common denominator of 10. 100. 1000. etc.

Without a common denominator, you would have to mentally make adjustments for the values of fractions. Of course, that is really establishing a common denominator in your head.

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โˆ™ 2015-10-11 05:19:02
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Q: Do you have to have a common denominator when you are adding fractions?
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Related questions

Do you need a common denominator for dividing fractions?

No only when adding or subtracting fractions a common denominator is needed


How do you minnous fractions?

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


What is the rule for adding fractions?

They have to have a common denominator


Why do you have to have a common denominator?

A common denominator is needed when adding or subtracting fractions of different denominators.


What is halfway between 1 over 4 and 1 over 2?

Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.Just add the fractions, and divide by 2. Before adding, you have to convert to a common denominator; in this case, you can use "4" as the common denominator.


Where is a denominator used?

Many places, but a common one is in adding fractions where we find a common denominator.


Does division need a common denominator?

No, You only need a common denominator when adding or subtracting fractions.


Do you need a common denominator when adding fractions?

yes


When adding or subtracting fractions you must get a?

A Common Denominator


Do you need common denominator when adding fractions?

Yes.


How is subtracting fractions like adding fractions?

You need a common denominator for both.


Adding unlike fractions?

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.


Do you have to find a common denomiter in dividing fractions?

No, you only need a common denominator when adding or subtracting fractions.


What do you do if you are adding three fractions?

Find a common denominator and proceed.


When adding fractions what you always must do is find the?

Common denominator


What is always needed when adding and subtracting fractions?

a common denominator


How do you solve a fraction problem when you don't have the same denominator?

If you are adding or subtracting unlike fractions, convert them to equivalent fractions with a common denominator.


How is adding like fractions and adding unlike fractions the same?

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.


What is the secret to adding fractions?

When adding or subtacting fractions make sure that the denominators are of the same values if they are not then find the lowest common denominator.


When adding or subtracting two fractions what is a necessary requirement?

A common denominator.


What two operations reequire a common denominator?

Adding and subtracting fractions.


When is the least common multiple used?

Probably the most common use is in adding fractions with different denominators. The least common multiple of the denominators is the least common denominator. Each fraction can be converted to one with the common denominator, and then you can add the fractions by adding their numerators.


What common denominator would you use to add fractions?

There isn't a universal answer to all problems. What you should try to do is find the lowest common denominator between the fractions you are adding.


A common multiple of two or more denominators?

It is a common denominator: useful for adding or subtracting fractions.


How is adding fractions like adding whole numbers... How is it different?

Similarities: the sum does not depend on which number you start with (distributive)Differences: you must find a common denominator for the fractions (whole numbers have a common denominator [1]