Cubic Numbers

Cube Numbers

7² vs. 7³

18/02/2021: Thursday - class 10

TL: Are cubed numbers similar to square numbers?

Remembering how to create square numbers:

•  $5\times5=5^2=25$  
  

•  $12\times12=12^2=144$  

Multiple Choice

Which number when squared is 169?

• 12

• 14

• 13

• 15

Multiple Choice

11² = _______ ?

• 131

• 132

• 122

• 121

Now let's investigate cube numbers:

https://www.youtube.com/watch?v=IWcl-IsjSOQ

7³ = 343 = 7x7x7

multiply three 7's together

Open Ended

8³ = ______?

Multiple Choice

Which number when cubed is 1000?

• 200

• 100

• 10

• 20

Multiple Choice

11³ = ________?

• 131

• 13331

• 1331

• 13631

Remember:

A cube number is the product (multiplication) of itself three times. 7x7x7 = 343 = 7³

Now let's go build some cubes