Flashcard - Approximating 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 16 is 4, because 4 x 4 = 16.

Front

What is the symbol for square root?

Back

Front

What is the square root of 25?

Back

5, because 5 x 5 = 25.

Front

Back

4, since 4 x 4 = 16.

Front

How do you estimate the square root of a number that is not a perfect square?

Back

Find the two perfect squares it lies between and estimate based on their square roots.

Front

Back

6 and 7, because 6 x 6 = 36 and 7 x 7 = 49.

Front

What is the square root of 121?

Back

11, because 11 x 11 = 121.

Front

Back

Approximately 3.6.

Front

What is the square root of 0?

Back

0, because 0 x 0 = 0.

Front

What is the relationship between square roots and exponents?

Back

The square root of a number can be expressed as that number raised to the power of 1/2.