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How can we show that -1 x -1 = 1 ? (14 Kb)
Flip and multiply to divide by 2/3 ? (34 Kb)
Cognitive Acceleration (113 Kb)
How to use the programs.
CD 1: Add, Subtract, Multiply & Divide - not available
CD 2 : Multiplication Exploded (750 Kb)
CD 3: Division Exploded (865 Kb)
Follow these help sheets to the letter to save time...
CD 1: Add, Subtract, Multiply & Divide start sheet (17 Kb)
CD 2: Multiplication Exploded start sheet (13 Kb)
CD 3: Division Exploded start sheet (14 Kb)