Adding and Subtracting Fractions on a Number Line

In my previous post, I presented a number line model for adding fractions. Now, I’d like to offer an updated Web Sketchpad fraction model below (and here) with two new pieces of functionality:

  1. You can subtract as well as add fractions.
  2. You can divide the number line into equal parts and choose the number of parts.

The video below explains how to use the Web Sketchpad model.

 

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