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Explain why $0.1 \overline{333}$ is not the simplest way to represent $0.1333 \ldots$
$0.1 \overline{3}$
Algebra
Chapter 1
An Introduction to Algebra
Section 3
The Real Numbers
The Language of Algebra
Equations and Inequalities
Functions
Linear Functions
Quadratic Functions
Polynomials
Campbell University
Oregon State University
Harvey Mudd College
Baylor University
Lectures
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we've got the decimal 0.133333 and so on. Repeating. Now the book has given us on inefficient representation. 0.1333 where the 333 has a repeat bar over it. Why is this such an inefficient representation? Well, let's take a look at what it means. If we were to write this out, we would have 0.1333 or perhaps 0.1333333 and so on. But the point is, every time we write this out, we have to have three threes or a multiple of three threes. On the other hand, if we were to write this with the repeat bar in a different spot, such as 0.13 with a repeat bar, then this could be written out as 0.13 Dr Thought or 0.133 But I thought or whatever, and this takes up much less space. 0.13 where the three has a repeat bar, takes up on Lee three characters for with the decimal, whereas this representation here takes up five characters, six with the decimal. So the much more efficient representation is to only put the repeat bar over the one term, this repeating rather than the entire thing.
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