CC 8NS-2

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., π^{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.

Grade: 8

Domain: Number Sense

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

All Standards Common Core Standards K-8