I am stuck on doing this math problem written on a sheet of paper.

Question

(eighty-one thousand minus fifty-five thousand, four hundred fifty-six)
It mas to be done manually, without a calculator.

Answer 1

These sites should help you figure out how to do your problem.

http://www.mathplayground.com/howto_regroupI.html

http://www.mathsisfun.com/numbers/subtraction-regrouping.html