Grade 8 · Expressions and Equations

CCSS.MATH.CONTENT.8.EE.A.2

Use square root and cube root symbols to represent solutions to equations of the form x² = p and x³ = p, where p is a positive rational number. Evaluate square roots of small perfect squares and cube roots of small perfect cubes. Know that √2 is irrational.

Read this standard on the official Common Core site

Lessons that teach this standard

• Square Roots: What They Mean and How to Estimate Them

  What a square root is, why √25 means 5 and not ±5, how to recognise perfect squares, and how to estimate a root like √50 to one decimal place without a calculator.