Approximating Square Roots for Grade 8

Why does the teacher use a calculator in the video?

• To find the exact square root

• To demonstrate how to use a calculator

• To verify the accuracy of approximations

• To perform basic arithmetic operations

What are the two perfect squares between which the square root of 66 falls?

• 81 and 100

• 64 and 81

• 36 and 49

• 49 and 64

How many spaces are there between the square roots of 64 and 81?

• 15

• 17

• 19

• 21

What is the approximate value of the square root of 66 using the fraction method?

• 8.115

• 8.111

• 8.124

• 8.118

Between which two perfect squares does the square root of 82 fall?

• 49 and 64

• 81 and 100

• 64 and 81

• 100 and 121

What is the fraction used to approximate the square root of 82?

• 1/17

• 1/19

• 2/17

• 2/19

What is the approximate value of the square root of 82 using the fraction method?

• 9.052

• 9.054

• 9.053

• 9.055

Between which two perfect squares does the square root of 20 fall?

• 9 and 16

• 4 and 9

• 16 and 25

• 25 and 36

What is the fraction used to approximate the square root of 20?

• 5/7

• 4/7

• 5/9

• 4/9

What is the approximate value of the square root of 20 using the fraction method?

• 4.444

• 4.447

• 4.472

• 4.477