Real Numbers

Front

What is a real number?

Back

A real number is any number that can be found on the number line, including both rational and irrational numbers.

Front

What is the square root of a number?

Back

The square root of a number x is a value that, when multiplied by itself, gives x. For example, √9 = 3 because 3 * 3 = 9.

Front

What is a perfect square?

Back

A perfect square is a number that can be expressed as the square of an integer. For example, 16 is a perfect square because 4 * 4 = 16.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a fraction of two integers. Its decimal representation is non-repeating and non-terminating.

Front

What is the approximate value of √119 rounded to the nearest tenth?

Back

10.9

Front

Between which two whole numbers does √40 lie?

Back

√40 lies between 6 and 7.

Front

Which of the following is an example of an irrational number: √8, ¾, 2, -1.325?

Back

√8 is an irrational number.

Front

What is the approximate value of √28 rounded to the nearest tenth?

Back

5.3

Front

Which of the following is a perfect square: 24, 48, 81, 110?

Back

81 is a perfect square.