Estimating Square Roots

The video tutorial explains how to estimate the square root of 90 by comparing it to the known square roots of 81 and 100. It demonstrates that since 90 is between these two numbers, its square root will be between 9 and 10. The tutorial suggests using 9.5 as a reasonable estimate and verifies that this is close to the actual value of 9.48, providing a practical approach to estimation.

What is the square root of 81?

• 11

• 9

• 8

• 10

Which two numbers is 90 between when considering square roots?

• 11 and 12

• 10 and 11

• 9 and 10

• 8 and 9

How much more is 90 than 81?

• 5

• 7

• 9

• 11

What is the estimated square root of 90 according to the video?

• 9.2

• 10

• 9.5

• 9.7

What is the actual square root of 90 to two decimal places?

• 9.48

• 9.50

• 9.45

• 9.52