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STANDARDS

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US-NY

Math

New York Math

Grade 8: The Number System

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

NY-8.NS.1

Fully covered
Understand informally that every number has a decimal expansion; for rational numbers show that the decimal expansion eventually repeats. Know that other numbers that are not rational are called irrational.
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NY-8.NS.2

Fully covered
Use rational approximations of irrational numbers to compare the size of irrational numbers, locate them approximately on a number line, and estimate the value of expressions.