Lesson materials located below the video overview.
Addition, subtraction, multiplication. Now it is time for division.
Here’s an example of a division problem: Compute \(276 \div 12\).
And here’s a horrible way to solve it: Draw a picture of \(276\) dots on a page and then circle groups of twelve dots. You will see, after about an hour, that there are \(23\) groups of twelve in a picture of \(276\).
Here’s a great way to solve it: Draw a picture of \(276\) dots in a \(1 \leftarrow 10\) machine and just see right away that there are \(23\) groups of twelve in it!
Read and play on to see how we can do this.
Cool Fact: Did you that the division symbol \(\div\) is called an obelus?
Supplementary Content for this Experience:
<<LINKS TO ACCESS OR DOWNLOAD THE MATERIAL LISTED HERE COMING SOON>>
- A PDF teacher guide for this experience: English, Serbian, Croatian, Chinese.
- A PDF of all the written text in this experience (no commentary)
- A PDF teacher guide for all nine experiences together
- Scolab’s Spectacular Full Interactive Experience
- Exploding Dots for Wolfram Users by Wolfram Users
- Exploding Dots for GeoGebra Users by GeoGebra Users
- Ulrich Kortenkamp’s App
- Ken Wessen’s App
- Chee Wei Tan’s App
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