Thinking Mathematically (6th Edition)

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

Chapter 4 - Number Representation and Calculation - 4.4 Looking Back at Early Numeration Systems - Exercise Set 4.4: 19

Answer

$59$

Work Step by Step

$L=50 \\X=10 \\I=1$ Note that when a smaller number is written before a bigger number, the smaller number is subtracted to the bigger number. Thus, $LIX = 50+(10-1) = 50+9=59$
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