Unit 5 - Square and Cube Roots

Summary of knowledge:
The goal was to be able to understand the concept of square and cubic roots, and be able to find the root of any given number. You should know that any number has a square and cubic root, even if the square root is irrational. When it's not perfect it's an irrational number between two numbers.

Key Vocabulary:
Irrational Number: Number in which decimal portion never ends and doesn't repeat.

Task Analysis:
1. Memorize the square roots from 1-12 and the cubic roots from 1-5.
2. Check if it would be a perfect or irrational number.
3. See in between which two numbers or what number your square/cubic roots is.
4. If perfect put the number. If irrational put between what numbers and write "irrational."

Examples:
1). √25 = 5 (5*5 = 25)
2). ∛27 = 3 (3*3*3 = 27)
3). √10 = between 3 and 4 (3*3 = 9 / 4*4 = 16) IRRATIONAL
4). ∛15 = between 2 and 3 (2*2*2 = 8 / 3*3*3 = 27) IRRATIONAL



USEFUL LINKS:

http://www.math-videos-online.com/algebra-square-roots.html

http://www.mathvids.com/lesson/mathhelp/664-square-roots

http://www.ixl.com/math/grade-7/square-roots-of-perfect-squares

http://www.ixl.com/math/grade-7/estimate-square-roots


Practice Quiz:

Square and Cube Roots » ProProfs Quizzes