8.NS.A.2
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 (e.g., π²).
Cluster 8.NS.AKnow that there are numbers that are not rational, and approximate them by rational numbers.
Where this sits in the school year
Our Grade 8 Math scope and sequence teaches 8.NS.A.2 in Unit 8: Roots & Irrational Numbers, weeks 23–24.
Introduce square and cube roots as inverse operations, and place irrational numbers on the number line. See the full pacing guide →
Builds on
Suggested prerequisites. This sequencing is our editorial guidance, not part of the Common Core.
Teaching Kits for this standard
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