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STANDARDS

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US-WV

Math

West Virginia Math

Grade 8: The Number System

Know that there are numbers that are not rational, and approximate them by rational numbers.

M.8.2

Fully covered
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 such as π^2. (e.g., 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.)