Mathematics, 18.10.2019 01:50 si1baalmasri

Which property or properties of arithmetic do you use when you calculate 3×70 by first calculating 3×7 = 21 and then putting a zero on the end of 21 to make 210? write equations to show which properties are used and where

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Which property or properties of arithmetic do you use when you calculate 3×70 by first calculating 3...

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