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游戏数学, 练习你的运算能力,
此游戏是不是 Tetris 的，是不是 Sudoku 。但你发挥你学习数学！
Freeware
You play with falling numbers and improve your mathematics!
An educational tool that teachers and students should try out.
http://www.valgetal.com/Valsetup.exe (550 KB)
Friendly regards,
友好的问候
Rinze Joustra
