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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.

www.mathsisfun.com/fractions_subtraction.html

There are 3 simple steps to subtract fractions. Step 1. Make sure the bottom numbers (the denominators) are the same; Step 2. Subtract the top numbers (the  ...

www.khanacademy.org/math/in-seventh-grade-math/rational-numbers/copy-of-addition-subtraction-fractions/v/subtracting-fractions-with-unlike-denominators

When subtracting fractions, we first find a common denominator. Any common multiple (the least common multiple is best for limiting computation to smaller ...

www.khanacademy.org/math/arithmetic/fraction-arithmetic/arith-review-add-sub-fractions/e/subtracting_fractions

Practice subtracting fractions that have different denominators.

www.webmath.com/subfract.html

This page will show you how to subtract fractions. Choose the form that best matches your problem, and fill in it. Only fill in one of the three forms, please.

www.khanacademy.org/math/arithmetic/fraction-arithmetic/arith-review-add-sub-fractions/v/subtracting-small-fractions-with-unlike-denominators

Sal subtracts fractions like 4/3 and 1/5. ... Practice: Visually add and subtract fractions ... Adding and subtracting mixed number with unlike denominators.

www.calculatorsoup.com/calculators/math/fractions.php

Fraction calculator to add, subtract, multiply, divide and reduce fractions and mixed numbers to lowest terms. Fraction calculator for adding, subtracting, ...

.ask.com/youtube?q=Subtracting+Fractions&v=1xsKnSoTAJA
Feb 12, 2014 ... Subtracting Fractions with different denominators can be done mentally both accurately and rapidly using this cool math trick. The way to minus ...

www.coolmath4kids.com/math-help/fractions/adding-and-subtracting-fractions-different-denominators

This is a bit tricky, but you'll think it's easy once you get used to it! Let's try this: 1/2 + 1/3. The main rule of this game is that we can't do anything until the ...

www.math-aids.com/Fractions/Subtracting_Fractions.html

This fraction worksheet is great for testing children and providing more practice in subtracting fractions. The worksheets may be selected for five different ...