8th Grade Common Core: 8.NS.2

Common Core Identifier: 8.NS.2 / Grade: 8

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

Detail: 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.