8th Grade Common Core: 8.NS.1

Common Core Identifier: 8.NS.1 / Grade: 8

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

Detail: Know that numbers that are not rational are called irrational. Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion repeats eventually, and convert a decimal expansion which repeats eventually into a rational number.