Subtraction Strip Board

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Using the Subtraction Strip Board, the child practices the equations of the subtraction tables 1-18. Natural wooden strips corresponding in length to the squares 1-18 are used to i ndicate the number to subtract from (minuend) and one set of blue strips used to subtract with (subtrahend). A set of red strips is included for further explorations. The two sets of strips are stored in wooden boxes with lid. Show more