# CCSS.8.NS.A.1

rational numbers, irrational numbers, decimal expansions; identify, interpret, explain.

System: US Common Core Math
Route: /math/standards/us-ccss/curratom-us-ccss-8-ns-a-1
Skills: 1

## Skills and Examples

- [Irrational numbers and rational approximation](/math/skills/number/irrational-approximation) — Equations, Variables, Expressions, and Inequalities