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Our online tests allow your kids to test their math skills. We make sure that your kids are having fun while studying by combining testing and practice sessions with cleverly designed math games.
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"Do not worry about your difficulties in mathematics, I assure you that mine are greater". Einstein, Albert (1879-1955)
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Rational numbers
Negative integers appear, when the greater integer is subtracted from the smaller one, for instance:
10 – 15 = – 5 .
The sign “minus” before 5 shows, that this number is negative.

Series of negative integers continue endlessly:
–1, –2, –3, – 4, –5, …
Fractional negative numbers appear, for example, when the greater number is subtracted from the smaller one:
Also it is possible to say, that fractional negative numbers appear as a result division of a negative integer by a natural number:
Positive numbers in contrast to negative numbers (integers and fractional ones), are the numbers, considered in arithmetic (also integers and fractional ones).

Rational numbers – positive and negative numbers (integers and fractional ones) and zero. The more exact definition of rational numbers, adopted in mathematics, is the following:

A number is called rational, if it may be presented as a vulgar, not a cancelled fraction of the shape: m / n , where m and n are integers.


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