Understanding Cube Roots

This video tutorial by Mr. J introduces the concept of cube roots. It begins with an explanation of cubing numbers, using examples like 2 cubed equals 8 and 5 cubed equals 125. The video then demonstrates how to find cube roots, showing that the cube root of 8 is 2, and the cube root of 125 is 5. Additional examples include finding the cube roots of 64 and 27, which are 4 and 3, respectively. The tutorial emphasizes understanding the inverse relationship between cubing a number and finding its cube root.

What does it mean to cube a number?

• Multiply the number by itself twice

• Divide the number by three

• Add the number to itself three times

• Multiply the number by itself three times

Tags

TEKS.MATH.8.2B

If 2 cubed equals 8, what is the cube root of 8?

• 4

• 2

• 8

• 16

Tags

TEKS.MATH.8.2B

How is the cube root related to cubing a number?

• It is the inverse of cubing

• It is the same as cubing

• It is unrelated to cubing

• It is the square of cubing

Tags

TEKS.MATH.8.2B

What operation would you perform to find the cube root of a number?

• Add the number to itself three times

• Find a number that multiplies by itself three times to give the original number

• Divide the number by three

• Multiply the number by itself twice

Tags

TEKS.MATH.8.2B

What is the cube root of 125?

• 5

• 10

• 25

• 15

Tags

TEKS.MATH.8.2B

If 5 cubed equals 125, what is 5 multiplied by itself twice?

• 125

• 10

• 15

• 25

Tags

TEKS.MATH.8.2B

Which number, when cubed, equals 64?

• 16

• 8

• 4

• 2

Tags

TEKS.MATH.8.2B

Which of the following is true about the cube root of 64?

• It is 16

• It is 4

• It is 2

• It is 8

Tags

TEKS.MATH.8.2B

What is the cube root of 27?

• 6

• 12

• 9

• 3

Tags

TEKS.MATH.8.2B

What is the result of 3 multiplied by itself three times?

• 81

• 18

• 27

• 9

Tags

TEKS.MATH.8.2B