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Math vocab again : the product of a number and its Blank is one
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Math vocab again : the product of a number and its Blank is one

User AlexVestin
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Multiply by the reciprocal. (Flip fraction) so the reciprocal of 3 is 1/3 (because 3= 3/1)
User Ashey
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If you multiply a number and its inverse, you get one. To obtain an inverse, you divide 1 by the number. 0 doesn't have an inverse, because you cannot divide by 0.
User Mightypile
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