8m - Tuesday 5/12 - Edge Lengths and Volumes

Master cube roots & volume! Grade 8 math worksheet with practice problems and calculator tips.

Learning TargetsI can approximate cube roots.I know what a cube root is.I understand the meaning of expressions like ∛5 Write the definitions for the following terms:Cube Root:Volume: Cube Root Calculator Cube root calculator to use for the next problems! Tools for finding the cube root On your iphone if you flip the calculator app sideways you can type the number then hit this button:Otherwise use this website for all of our cube root problems: Warm Up: Squares and Cubes #1 Find the approximate value of each variable using your calculator or the square and cube chart below! Major Key Question 1: #2 To cube a number we multiply it by itself how many times? #3 We know that all of the side lengths of a cube are the same. If the volume of a rectangular prism is v = l * w * h. How could we rewrite the formula for the volume of a cube? v = b*h v = 1 * b v = s^3 v = pi * r^2 Send a video. Not a thousand words. Finding cubes with a cube New Skill: Finding the dimensions of a cube #4 We know that all of the sides of a cube have the same length. Using this knowledge complete the table below. Keep in mind that the cube root of a number cubed results in that number so... ∛5 ^3 = 5Fill in the table using the information provided. Sides (write as a decimal approximate) Volume Volume Equation 27 ∛5 (∛16)^3 = 16 Practice: Placing Cubes Between Whole Numbers #5 Fill in the table of square and cube roots with the two numbers they fall between on the number line. The first one is done for you.Use the table if you get stuck! Cube Numbers it lies between ∛6 1 and 2 ∛8 ∛12 ∛18 ∛24 ∛27 ∛99 ∛1000 Major Key Question 2: #6 What makes it more difficult to place the cube roots as opposed to square roots? Mr. Dubinky's Major Keys: MAJOR KEY ALERT 1. If a cube has a volume of 27 cubic inches, what is its side length? _2. What is the solution to x^3 = 150 , and what two integers would it fall between on a number line? _ Exit Ticket: Pick the two places on the number line that represent ∛36 and √36.