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Assuming that these "like" fractions have common denominators, to add or subtract them, simply add or subtract their numerators (numbers on top of the fraction), then put that answer over the like denominator.

Example: 5/7 + 1/7 = 6/7

Example: 3/8 - 2/8 = 1/8

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โˆ™ 2011-07-31 05:03:46
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Q: How do you add and subtract like fractions?
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Related questions

Do you add and subtract like and unlike fractions in the same way?

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


Why are two fractions converted into like fractions?

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.


How do you add two fractions that have like denominators?

In fractions, you can NEVER add or subtract


What you need to add or subtract fractions?

You need a common denominator in order to add or subtract fractions.


How do you add and subtract dissimilar fractions?

Make the fractions equivalent then subtract


How do you add and subtract fractions with the same denominator?

it stay the same when you subtract fractions and when you add fractions.


Why do you have to turn unlike fractions into like fractions to add or subtract?

because its just one of the rules of math :)


How do you add and subtract by 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.


How would you add or subtract fractions with like denominators?

The same way you would add or subtract whole numbers, leaving the denominators alone.


To add and subtract fractions less than 1 you add or subtract only the what?

Numerators


Do you always have to have like numerators in fractions before you can add or subtract?

No, the denominators have to be the same.


Why do you need a common denominator with fractions?

You can add or subtract fractions only if they are "like" fractions, that is, only if they have the same denominator - unless you know your fractions really well.


Why is it necessary to convert two fractions into like fractions before adding and subtracting them?

Because think of like fractions as the same things.. you can subtract halves from halves for example, but what does it mean to take away a half from a third?By converting them into like fractions, we can add or subtract them easily.


Is it important to know how to add and subtract fractions why?

it is important to learn how to add and subtract fractions because we can use it when a time comes , when we have our own business and others .


When you add or subtract fractions with unlike denominators why do you have to find LCM?

Because to add fractions, the denominators must be equal.


When you add and subtract fractions can the answer be a mixed number?

Yes.


How are lcm's used in adding or subtracting fractions?

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


How are fractions under addition?

In order to add or subtract fractions, they must have the same denominator.


Can you explain adding and subtracting fractions with like denominators?

When you add or subtract fractions with like denominators, you just add or subtract the numerators and put them over the same denominator. For example, 3/5 - 2/5 = (3 - 2)/5 = 1/5


How do you add or subtract fractions when negative?

The same as with positive ones. Make sure they have the same denominator and add or subtract their numerators.


How is finding the LCM revelant when adding and subtracting fractions?

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.


How can using the GCF and LMC help you you add subtract and multiply fractions?

To add and subtract unlike fractions, find the LCM of the denominators and convert them to equivalent like fractions. You don't have to do anything to fractions to multiply them, but you may need to reduce one after multiplying. To do that, find the GCF of the numerator and the denominator and divide both of them by it. If the GCF is 1, the fraction is in its simplest form.


Why do fractions need to have a common denominator before add or subtract them?

because it would be diffcult to understand.[you don't add or subtract the demonters]


What do you not have to think about when you add or subtract fractions?

Whether the denominators are common or not.


When does the LCM come in handy?

When you want to add or subtract fractions.