## 8.NS.1

Grade / Level | Grade 8 |
---|---|

Domain | The Number System |

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

Standard | 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. |