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You add or subtract only the numerators

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โˆ™ 2014-04-13 12:05:22
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Q: How do you add and subtract like denominator?
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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,


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

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


How do you add and subtract similar fraction?

Just simply add/subtract the numerators then copy the denominator.


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 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.


Why do you think it is important to know how to find the common denominator of two rational polynomials?

You need to find the common denominator in order to add or subtract them. You can only add or subtract "like things" and by finding a common denominator you make both rational expressions into things that can be added or subtracted.


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.


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]


How do you add and subtract mixed numbers with unlike denominators?

just change the fration with the smallest denominator and add or subtract the way you always do.


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

Because addition and subtraction are defined in terms of like terms.


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.


When is a common denominator needed and when is one not needed?

A common denominator is required to add or subtract fractions and not otherwise.


How do you add and subtract like fractions?

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


Why does the denominator has to be the same?

it makes it eaiser to add subtract or divide or multiply


What must you find to subtract and add with different denominators?

the new denominator


How do you add and subtract improper fractions with different denominator?

he fact that they are improper is irrelevant. Re-scale the fractions so that they have the same denominator and thenadd or subtract as required.


How do you do arithmetic complex math?

Addition and subtraction: add (or subtract) the real parts, then add (or subtract) the imaginary parts. Multiplication: treat just like multiplying binomials (like with a variable x).After multiplying, convert any i² terms to -1.Division: multiply both numerator and denominator by its conjugate, which will make the denominator a real, then divide real part by denominator, and then divide imaginary part by denominator.


Why is it easy to subtract and add with the fraction that has the same donominator?

Because if you have the same denominator then you don't have to find the common denominator.


Why do fractions need to have common denominator before you add or subtract them simple answer pleas?

So that you only have to add/subtract the numerator which makes it much easier.


Why do you need to use common denominator?

To get the right answer when you add or subtract unlike fractions.


What properties allow you to add and subtract mixed numbers?

they must have a common denominator


Why do you need a common denominator?

Common Denominator means that the denominators in two (or more) fractions are common, or the same. The common denominator is important because before you can add or subtract fractions, the fractions need to have a common denominator.Sometimes fractions have different denominators, like 2/3 and 3/4. If you want to add or subtract them, they need to have the same denominator. In order to do that, you find a common denominator which is the same thing as a common multiple, only with denominators.


Why do you find common denominators?

In order to add or subtract one fraction from another, they must have a common denominator, or the same denominator. That's because it's impossible to add two fractions that have a different number of parts.


How do you subtract fractions with like denominators?

Subtract the numerators as we normally subtract them and then divide the resultant by the denominator. It's just simple like that.


Why if there are two fraction having different denominator are you are going to find first their least common denominator?

To get the right answer when you add or subtract them.