Why plus into plus is plus?

Answer 1

The division of a positive number by another positive number yields another positive number, because that's how numbers work; if you have trouble with the concept, go back to basics, and imagine that you are cutting up a pie in order to share it with your family. If you have one pie (a positive number) and four people who want to eat some pie (also a positive number) then everybody can have a quarter of a pie (also a positive number). Negative numbers don't get involved in pies unless you actually owe someone a pie. But all the various forms of arithmetic, using positive or negative numbers, can be examined in real situations, whether involving pies or money or whatever. It all works out.