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To add fractions, you have to create common (the same) denominators.
You do this by multiplying the fractions times a fraction that is equivalent to 1 (such as 3/3). Multiplying by 1 does not change the value of the fraction. This is the Identity Property of Multiplication. For example 1/2 x 3/3 = 3/6 which is the same fraction in a different form.
Example :
adding 3/8 and 1/3 -- you can see that both fractions could be expressed using the common denominator 24 : 3/8 x 3/3 = 9/24 and 1/3 x 8/8 = 8/24.
3/8 + 1/3 = 9/24 + 8/24 = 17/24
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How do you add two fractions with a different denominator?
You add two fractions with a different denominator by multiplying the denominators by a number that will make them equal. Be sure to multiply the numerator by that number too.
When you add fractions do you add the denominator to?
No.
When you add fractions do they have to have the same denominator?
Yes you have to add with the same denominator. when ever you do fractions they have to have the same denominator no matter what. So thats a yes
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 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.
