2.4 Modeling Addition and
Subtraction with Regrouping
Objective
Understand
addition and subtraction with regrouping using concept models and expanded
algorithms.
Overview
It is one
thing to understand the concept of addition and subtraction of single digit
whole numbers and integers. Keeping track of the complexities of
these operations when working with large numbers is a different
matter. For that, we need a concept model to illustrate the place
value system of numeration and an expanded algorithm to keep track of
details.
