Overview

Addition and subtraction of integers
{… 4, 3, 2, 1, 0 1, 2, 3, 4 …} is normally introduced at the middle
school or junior high school level. School mathematics and science
topics such as elevation (above/below sea level) and bank account balances
may be used to motivate the study of integer operations.
This lesson addresses the questions,
 What is the meaning
of addition of subtraction of integers?
 What is the logical
basis for regrouping?
The Set Model and the Measurement Model are used to represent the ideas.
