These patterns serve as guides when extracting the square root on the Algebraic Peg Board. The material consists of 4 plastic cards with silk-screened square root patterns in...
501 sheets with 15 problem grids (twelve 1/2”- squares each) printed in gray.
German version
Box with colored bead bars 1-9 and nine golden bead bars of 10, to be used with the teen boards.
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