Square Root Calculation Quiz

What is the first step in mentally calculating the square root of a number?

• Add 10 to the number.

• Double the number.

• Find the closest perfect square below the number.

• Subtract the number from 100.

In the method described, what do you do after finding the closest perfect square?

• Divide the number by the perfect square.

• Multiply the perfect square by 2.

• Find the difference between the number and the perfect square.

• Add the difference to the perfect square.

How do you calculate the decimal part of the square root in this method?

• Subtract the difference from the whole number.

• Add the difference to the whole number.

• Multiply the difference by the whole number.

• Divide the difference by the doubled whole number.

What is the approximate square root of 93 using the method explained?

• 9.70

• 9.64

• 9.60

• 9.67

Which of the following is a perfect square?

• 20

• 35

• 25

• 30