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.  

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


Page last modified on May 19, 2011, at 03:15 AM