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Common Core MATH 8 NS 2 Grade 8 The Number System Know That There Are Numbers That Are Not Rational And Approximate Them By Rational Numbers

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The Number System: Know That There Are Numbers That Are Not Rational, And Approximate Them By Rational Numbers.

Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line diagram, and estimate the value of expressions (e.g., ?2). For example, by truncating the decimal expansion of ?2, show that ?2 is between 1 and 2, then between 1.4 and 1.5, and explain how to continue on to get better approximations.

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