Falling sums
Do you know the answer before the problem hits the floor?

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Falling problems is based on the well known game Tetris. Before you start this game, you have to make two choices: the difficulty-level of the game (0-20, 0-200) and the operation. You can choose from: addition, subtraction or a combination of these two. Estimate if the values are higher or lower than the value on the red line (10,100). Move the problem to the corresponding half of the field.

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Abstract	Falling problems is based on the well known game Tetris. Before you start this game, you have to make two choices: the difficulty-level of the game (0-20, 0-200) and the operation. You can choose from: addition, subtraction or a combination of these two. Estimate if the values are higher or lower than the value on the red line (10,100). Move the problem to the corresponding half of the field.
Keywords	Getallen, Optellen, Aftrekken
Target group	Primair Onderwijs, Voortgezet Onderwijs
Date last modification	03-09-2013, ORG: Universiteit Utrecht, Freudenthal Instituut