a) Select a variety of one- and two-digit numbers between 1 and 99 and multiply each by
Question:
a) Select a variety of one- and two-digit numbers between 1 and 99 and multiply each by 9. Record your results.
b) Determine the sum of the digits in each of your products in part (a). If the sum is not a one-digit number, determine the sum of the digits of the resulting sum again until you obtain a one-digit number.
c) 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 Let the selected numbers be b The sum of the digits when a oneor twodigit number ...View the full answer
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Related Book For 
A Survey Of Mathematics With Applications
ISBN: 9780135740460
11th Edition
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
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