Estimating Square Roots (Math 8B)

Front

What is the square root of a number?

Back

The square root of a number is a value that, when multiplied by itself, gives the original number.

Front

What is a perfect square?

Back

A perfect square is an integer that is the square of another integer. For example, 1, 4, 9, 16, and 25 are perfect squares.

Front

Estimate the square root of 155 to the nearest hundredth.

Back

12.5

Front

Which of the following is NOT a perfect square: 196, 169, 121, 132?

Back

132 is NOT a perfect square.

Front

Estimate the square root of 119 to the nearest hundredth.

Back

10.9

Front

Estimate the square root of 28 to the nearest hundredth.

Back

5.3

Front

Estimate the square root of 13 to the nearest hundredth.

Back

3.6

Front

How do you round a number to the nearest hundredth?

Back

To round to the nearest hundredth, look at the third decimal place. If it's 5 or more, round up the second decimal place by one. If it's less than 5, keep the second decimal place the same.

Front

What is the approximate value of √25?

Back

5, because 5 x 5 = 25.

Front

What is the approximate value of √36?

Back

6, because 6 x 6 = 36.