Estimating Square Roots

Front

What is a square root?

Back

A square root of a number is a value that, when multiplied by itself, gives the original number. For example, the square root of 9 is 3, because 3 x 3 = 9.

Front

What is the symbol for square root?

Back

The symbol for square root is √.

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

How do you estimate the square root of a non-perfect square?

Back

To estimate the square root of a non-perfect square, find the two perfect squares it lies between and then approximate the value.

Front

Estimate the square root of 50 to the nearest tenth.

Back

The square root of 50 is approximately 7.1.

Front

Between which two whole numbers is √30?

Back

√30 is between 5 and 6.

Front

What is the square root of 64?

Back

The square root of 64 is 8.

Front

Which number is NOT a perfect square: 25, 36, 45, or 49?

Back

45 is NOT a perfect square.

Front

How can you determine if a number is a perfect square?

Back

A number is a perfect square if its square root is an integer.

Front

What is the approximate value of √20?

Back

The approximate value of √20 is 4.5.