← All standards
Common CoreCCSS.Math.Content.8.NS.1CCSS-2010

Know that numbers that are not rational are called irrational

Common Core·math·Grade 8·Bloom: Understand·Last verified: May 21, 2026

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.

🎯 Practice this standard →Open publisher source ↗

Skills that teach this standard (1)

1 with free practice questions
Number Sets & Infinity
Number Representation & Place Value · Ages 13–14 · try 3 free questions

Concepts covered (0)

Showing all

No concepts mapped to this standard yet. Our curriculum library is expanding — check back soon.

Standards are re-verified against the publisher source quarterly. See all standards →