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Simple Lattice Approach to Mathematics/Subtraction Step-by-Step Subtraction Problem Layouts (S.L.A.M. Mathematics)
Simple Lattice Approach to Mathematics/Subtraction StepbyStep Subtraction Problem Layouts - S.L.A.M. Mathematics Author:Susan James, Louise Pedrazzini S.L.A.M. is a step-by-step approach to mathematics that provides a source of drill, reinforcement and gradual progression through the basic mathematical facts and operations.