– discover the exercise format interactively and experiment with it.
The interactive math triangle (for iOS) is a virtual tool that can be used to illustrate and explore problems involving arithmetic triangles.
Description of the app
Calculation triangles encourage flexible thinking and calculation. With this calculation triangle you can solve tasks with calculation triangles - as offered in many exercise books and math textbooks - interactively by trying things out. This is how it works:
- Place tiles by touching the triangle with one or more fingers.
- Move tiles from one space to another by touching and dragging them.
- Delete a tile by dragging it out of the calculation triangle.
- Cover a field by closing the shutter.
- If you cross out a number, you can hide and show it again.
- Shake the math triangle to clear all tiles.
Arithmetic triangles are designed for the concept of productive practice. Arithmetic triangles can be used to work on problem-structured exercises, for example the following tasks:
- Find the missing numbers?
- Find out how many tiles are in the covered field?
- How do the marginal numbers change if…
… one (2, 3, …) tile is added/removed in each field?
… when one (two, three, …) tile is moved from one field to another.
… one (two, three, …) tile can be added/removed in two fields? - Can all three marginal numbers be odd?
- What is the relationship between the sum of the edge numbers and the number of tiles placed? Can you "create" any three edge numbers or are there restrictions?
- Invent your own tasks using the arithmetic triangle and give them to a learning partner.
Browser and offline version
There is also a Browser version, as well as offline versions for Mac and WindowsUnfortunately, they only work with a functioning Flash plugin.
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