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STANDARDS

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US-KY

Math

Kentucky Math

Grade 8: The Number System

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

8.NS.1

Mostly covered
Understand informally that every number has a decimal expansion; the rational numbers are those with decimal expansions that terminate in 0s or eventually repeat. Know that other numbers are called irrational. (MP.2, MP.6, MP.7)

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 diagram and estimate the value of expressions. (MP.2, MP.7, MP.8)