Undoing Multiplication With Division

Objective

In this video, students explore the relationship between multiplication and its inverse, division. They will attempt to "undo" multiplication by dividing once, twice, or even three times.

Steps

1. We begin with the simplest, one-step case. Multiply by a number, then divide by the same number, and you return to where you started. But then, we try a two-step version, such as: 10 × 6 ÷ 3 ÷ 2 = 10.
2. Now we look at cases where we divide three times to undo multiplication.
3. Finally, students have a chance to continue practicing this idea with a web app.