Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 4 - Number Representation and Calculation - 4.1 Our Hindu-Arabic System and Early Positional Systems - Exercise Set 4.1 - Page 218: 60

Answer

$29,232,242$

Work Step by Step

Using the table and that the place values are $1,20,18\cdot20=360,18\cdot20^2=7200,18\cdot20^3=144000, 18\cdot20^4=2,880,000$: The numerical value as a Hindu- Arabic numeral is: $10\cdot2,880,000+3\cdot144000+0\cdot7200+0\cdot360+12\cdot20+2\cdot1=28,800,000+432000+0+0+240+2=29,232,242$
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