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Calculation with fractions


Fractions are entered in the form numerator/denominator (no space separated by a slash). If the result is an integer, it can be entered as is, e.g. 3 instead of 3/1.

Options - Back to the main page.
Easy Medium Hard

Simplify 
2100
10
 = 
Simplify 
420
600
 = 
Simplify 
8400
1260
 = 
Simplify 
900
180
 = 
Simplify 
420
420
 = 
Simplify 
420
225
 = 
Simplify 
84
60
 = 
Simplify 
840
60
 = 
Simplify 
168
420
 = 
Simplify 
120
60
 = 
Once all questions are answered correctly, the image of an animal appears.
Time: Mistakes:
.
Display of fractions: Inline
As a fraction
Game mode: Simplify.
Addition.
Subtraction.
Multiplication.
Base of random numbers:

This page generates random fractions by generating a random numerator and denominator independently. In order to generate interesting numbers, numbers with many prime factors are generated as follows:
For each number in the above list "Base of random numbers", a coin is tossed and those numbers with head are selected. The random number is then the product of the selected numbers.
In order to obtain sufficiently many different numbers the above list should contain at least six numbers.

For an easy game, the numbers 2, 2, 2, 3, 3, 5, 5 are a possible choice.
For a harder game choose 2, 2, 2, 2, 3, 3, 5, 5, 7.


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Bernd Krüger, 2022
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