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#### Description:

This is a task from the Illustrative Mathematics website that is one part of a complete illustration of the standard to which it is aligned. Each task has at least one solution and some commentary that addresses important asects of the task and its potential use. Here are the first few lines of the commentary for this task: Decide whether each of the following numbers is rational or irrational. If it is rational, explain how you know. $0.33\overline{3}$ $\sqrt{4}$ \$\sqrt{2...

#### Subjects:

• Mathematics > General
• Education > General

#### Keywords:

Informal Education,Middle School,NSDL,Grade 8,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-103,Vocational/Professional Development Education,Mathematics,Education,oai:nsdl.org:2200/20130211105157206T

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Update Standards?

#### CCSS.Math.Content.8.NS.A.1: Common Core State Standards for Mathematics

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.
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