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73 calculators online
News:
2017.01.08
  New calculla released ! Please go to calculla.com for the calculla v2. It's better, faster, more beautiful, redone for you in most modern technologies.
2015.08.25
  Two cars related tables released today: Tire codes - speed ratings and Tire codes - load index
2015.07.30
2015.04.06
  This time 3 new calculators for fractions: Fractions: adding and subtracting, Fractions: 4 operations and Fractions: inverse (reciprocal). Each of them shows all sub-steps needed to compute common denominators, create improper fraction (if needed), reduce the fraction etc.

Fractions: adding and subtracting
Calculator shows how to add or subtract two fractions step by step. Simply enter two fractions, select add or subtract and get list of all partial steps needed to compute result. Train your math with calculla!
How to use this tool
Calculator shows how to add (subtract) two fractions. Enter input fractions and select needed operation (addition or subtraction) in form below and calculla will compute the results by performing following steps:

  • I. Convert input fractions into improper form. If your fractions do not containt wholes part, then this step is unnecessary and can be skipped.
  • II. Find common denominator. If input fractions already have common denominator, this step can be skipped.
  • III. Perform operation. In this step, calculla adds (subtract) nominators and saves denominator without changes.
  • IV. Get wholes part out of result. This step is needed only if result is improper fraction i.e. its nominator is greater than denominator.
  • V. Shortening result to the simplest form.
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