And I though German was weird for pronouncing the units before the tens, and the use of "," instead of "." for the decimal point. (yes I know other countries use it too.)
I can understand the use of base 20 but "-1/2 + 5" instead of "4+ 1/2" ?!?
At least it makes me appreciate that the numbers in English are easy. (although the rest of the language is another story.)