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• Two-sided puzzles feature subtraction problems on the front and full-color photos on the back
• If the problems are solved correctly, the picture on the back will be correct
• Includes 10 self-checking puzzles with subtraction facts from 1 - 1 to 24 - 10
• Includes 10 clear plastic trays to work puzzles in (see Ways to Use)
• 6" puzzles are constructed from long-lasting laminated chipboard
• Additional puzzles available