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Tool: Ninedigits workshop
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Description: Puzzle with 9! possibilities and 336 solutions. The problem posed in Ninedigits workshops consists in the organization of the numbers 1 to 9 in a square of 3 * 3 to make the sum of the numbers of the first two rows is equal to the bottom row. This app is aimed at reflecting on the addition and commutative property of addition. Online version:
Technology Type: Android 
Guide: User's Guide (opens a new window)
Author: Wendy Petti & Maurici Carbo
Language: English 
Cost: Requires payment for use

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