Rely less on math notation in numeral system explanation

[rylev]

The explanation of numeral systems is really great for some people, but might be a bit too heavy on math notation for some others. I've tried to even out the balance a bit. Let me know if you think it's an improvement or not.

[steveklabnik]

Thanks so much for this! I agree. I think this is how a lot of material in the book is going to go:

1. import some text
2. get it in front of people
3. find out that there's a lot of assumptions
4. go back and explain more slowly
5. repeat

[azerupi]

Wow, yes this is indeed a lot nicer to read through :) The only thing I find a little strange is the first paragraph:

In math we use a particular numeral system to denote a particular number. A numeral system is defined by the particular symbols it uses to convey numbers.

I am not sure what that is supposed to mean, what about:

In mathematics we use numeral systems to express numbers. A numeral system contains a collection of symbols to represent small numbers and a set of rules to represent larger numbers by a combination those symbols.