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This set includes ten different tic tac toe game boards, all featuring beginning subtraction problems using numbers 0-20. This is played like regular tic tac toe, but players must first correctly answer the subtraction problem before placing their x or o. Then, the first player with three in a row either vertically, horizontally, or diagonally wins!
These would be a great center activity. Answer keys can be printed on the back to make these self checking and they can be laminated to use over and over again!