Subtraction Algorithm (Lesson 4 of 18)

This lesson plan, from the Contextualize to Learn project at the University of Wisconsin-Madison, is an exploration in subtracting multi-digit natural numbers. In this lesson, students work in pairs to subtract two multi-digit Natural numbers where the subtrahend and minuend differ in number of digits. Students will also practice estimating differences mentally. This lesson plan includes both student and instructor notes, as well as a homework assignment with solutions. Additional lessons in the series are available to view separately.

The expected total time for the lesson is 55 minutes.