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Puzzle Odčítání 1–65 Learn basic subtraction with this puzzle with 58 pieces. You will find 1 math 'problem' on each piece. The answer to each 'problem' is displayed in bright neon colors underneath, on the frame. Each of the pieces with curved edges look the same, even though they are different. Each piece will only fit when it is being placed above its proper answer. You can have fun with this puzzle and learn a lot at the same time. Puzzles promote motivation and the ability to concentrate. You can work at your own pace, and you see instantly whether you are right or wrong. The puzzle is best suited for slightly older children. with 58 pieces