Federal Way Public Schools KUD Concept Organizer 2013/2014 Course/Grade 8 8.EE.2 Priority Standard: . 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 irra onal. Know Do (Skill, Factual) (Concepts, Procedural, Application, Extended Thinking) Students recognize that squaring a Write solutions to equations using square number and taking the square root √ of root and cube root symbols a number are inverse operations; Evaluate square/cube roots of small perfect likewise, cubing a number and taking the squares/cubes cube root 3 are inverse operations. This Recognize that the square root of 2 is understanding is used to solve equations irrational containing square or cube numbers. Equations may include rational numbers 2 2 3 such as x = 1 /4, x = 4 /9 or x = 1/8 (NOTE: Both the numerator and denominators are perfect squares or perfect cubes.) Students recognize perfect squares and cubes, understanding that non‐perfect squares and non‐perfect cubes are irrational. Students understand that in geometry a square root is the length of the side of a square and a cube root is the length of the side of a cube. The value of p for square root and cube root equations must be positive. Understand (Big Ideas, Conceptual): Roots Perfect squares and cubes Essential Questions (Answers Big Idea): How do I find the cube root and square root? What is a perfect square?