Q: How do you add and subtract like denominator?

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

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

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

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

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.

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

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

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

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

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.

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

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

it makes it eaiser to add subtract or divide or multiply

the new 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.

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 iÂ² 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.

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

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

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

they must have 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.

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.

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

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