Finger Blocks
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These Are "Counting Manipulatives" For Teaching Addition, Subtraction, And Basic Number Concepts. - It Is Easy To See That 1+1 = 2, 2+3 = 5, 5, 7, 3 Are Odd (But 2, 4, 6, 8 Are Even). Individual Files Are All Generated From The .Scad File.
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