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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 
42
420
 = 
Simplify 
30
2520
 = 
Simplify 
18
350
 = 
Simplify 
36
12
 = 
Simplify 
840
15
 = 
Simplify 
21
1050
 = 
Simplify 
42
30
 = 
Simplify 
2
1200
 = 
Simplify 
720
70
 = 
Simplify 
180
6
 = 
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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