In this paper, we therefore construct a special algorithm for the carry-free addition and subtraction of binary SD numbers, i.e., addition and subtraction of n-digit numbers are performed with ...

Becoming comfortable with two-digit and three-digit numbers is an important skill in second grade. Your child will master addition and subtraction problems ... to use before your child uses the ...

It’s ironic that after months of teaching the importance of place value, a fundamental concept in math, we do not apply that knowledge in practical ways to simplify multi-digit addition.

This 3-year longitudinal study investigated ... than were students who initially learned standard algorithms. This article is available to members of NCTM who subscribe to Journal for Research in ...

In this paper, we therefore construct a special algorithm for the carry-free addition and subtraction of binary SD numbers, i.e., addition and subtraction of n-digit numbers are performed with ...