lesson
Comparing Irrational Numbers Using Approximations
Compare two irrational numbers by finding rational approximations for each.

Compare two irrational numbers by finding rational approximations for each.
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8 lessons
Use rational approximations to locate, compare, and order irrational numbers on a number line.
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., π2). 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.