Examples for

Common Core Math: Grade 8: Number System

In eighth grade, students expand their knowledge of rational numbers to all real numbers, which include irrational numbers such as pi or the square root of 2. Students classify numbers by noting that rational numbers have either finite or repeating decimal expansions. Students use their knowledge of rational numbers to approximate and compare irrational numbers.
Common Core Standards

Get information about Common Core Standards.

Look up a specific standard:

CCSS.Math.Content.8.NS.A.1
eighth grade common core standard NS.A.2

Search for all eighth grade standards in a domain:

8th grade number system common core standards
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Real Numbers

Explore properties of real numbers.

Classify numbers (CCSS.Content.Math.8.NS.A.1):

is 5/6 a rational number?
is the square root of 2 rational?
is sqrt(3) irrational?

Convert between decimals and fractions (CCSS.Content.Math.8.NS.A.1):

0.44444... as a fraction
rationalize 0.124124124...
2/9 as a decimal

Approximate irrational numbers (CCSS.Content.Math.8.NS.A.2):

square root of 2 as a decimal
approximate pi to 10 digits

Order a list of numbers (CCSS.Math.Content.8.NS.A.2):

sort 1, -2, sqrt(3), 4.2, 5/2
order -1, 1/2, |0.5|, sqrt(9), -3.2
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