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To add or subtract fractions, they must have the same denominator. If they do not, make the least common multiple of all of the denominators the new denominator. After adding or subtracting, reduce your answer.

When giving the fractions like denominators, whatever number you multiply the old denominator of a fraction by, you must also multiply it by the numerator.

Sources:

See Also:
Least Common Denominators

www.khanacademy.org/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/v/adding-fractions-with-unlike-denominators

How to

www.khanacademy.org/math/pre-algebra/fractions-pre-alg/fractions-unlike-denom-pre-alg/e/adding_fractions

Practice

www.ixl.com/math/grade-5/add-fractions-with-unlike-denominators

Fun math practice! Improve your skills with free problems in '

math.about.com/od/fractions/ss/denom.htm

Like many other topics in math, there is usually more than one method to get to the desired results. Adding fractions and finding common demoninators is merely another example of this. Multiplying denominators to find common denominators . More »

www.ask.com/youtube?q=Adding Fractions with Unlike Denominators&v=lKiR4BBt6TE

Sep 21, 2011 ... Add Fractions ! Printable worksheet here: https://docs.google.com/document/d/17t
-zMu-Y23tlErj9vzD7KKITwLHNyyuCVdXkdZdxgtI/edit This ...

www.helpwithfractions.com/adding-fractions-different-denominators/

Nov 3, 2014

www.coolmath.com/prealgebra/01-fractions/fractions-12-adding-subtracting-different-denominators-01

This prealgebra lesson explains how to

learnzillion.com/lesson_plans/8178-add-and-subtract-fractions-with-unlike-denominators

learnzillion.com/lesson_plans/6861-add-fractions-with-unlike-denominators-by-creating-area-models

Popular Q&A

Q:
Adding fractions with unlike denominators ?

A:
When adding fractions , they must have the same denominator (number on the bottom). First you must find the least common denominator . 3/16 = 3 / (2*2*2*2) 7/8 = ...
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Source:
answers.yahoo.com

Q:
Adding fractions with unlike denominators ?

A:
Okay so to solve this you need to find the LCD which is the Least Common Denominator . The least common denominator is also the least common multiple. Basically ...
Read More »

Source:
answers.yahoo.com

Q:
Adding fractions with unlike denominators ?

A:
Quoting alternap18: um you know I already know if they're the same on the bottom you can add them on the top Like this 1/8+1/8=2/8 Thats easy Right - that's why...
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Source:
www.askmehelpdesk.com

Q:
What is adding fractions with unlike denominators ?

A:
I'm really sorry I've done this before but i just totally am thinking the same exact thing!
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Source:
wiki.answers.com

Q:
What is the rule for adding fractions with unlike denominators ?

A:
You convert them, using equivalent fractions , so that they have the same denominator - a common multiple of the deniminators. Then the denominator of the sum is...
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Source:
wiki.answers.com