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 - Concept and Vocabulary Check - Page 241: 6


See below.

Work Step by Step

A line above the number implies a multiplication by $1000$ by definition, thus here $\overline{L}=1000\cdot50=50000$.
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