In English we start with "one", "two", but "three" can stretch out a bit and "seven" is a real slower-downer, being two syllables long, so the English number-words take a little longer, a third of ...

There are many different types of numbers, some of which you may remember from school: natural, rational, irrational, imaginary, calculable and incalculable numbers. Today, however, we are going ...

The work described in this article was based on a historical perspective in order to analyze the extension of the natural-number domain to the integers in students' transition from arithmetic to ...