Mathematics, 04.07.2019 21:00, j015

Tony says to multiply 219×3, you multiply 2×3, 1×3 and 9×3, then add the products.. explain tony's error. how would you tony understand how to correctly multiply 219×3

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Tony says to multiply 219×3, you multiply 2×3, 1×3 and 9×3, then add the products.. explain tony's e...