(a) Find the sum of the digits in each of your products in part (a). If the...

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(a) Find the sum of the digits in each of your products in part (a). If the sum is not a one-digit number, find the sum of the digits of the resulting sum again until you obtain a one-digit number.

(b) Make a conjecture about the sum of the digits when a one- or two-digit number is multiplied by 9.

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A Survey of Mathematics with Applications

ISBN: 978-0134112107

10th edition

Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde

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Question Posted: Dec 22, 2018 04:50 AM

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(a) Find the sum of the digits in each of your products in part (a). If the...

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A Survey of Mathematics with Applications

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