Real Number (Flashcard 1)

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 are rational numbers?

Back

Rational numbers are numbers that can be expressed as a fraction of two integers, where the denominator is not zero.

Front

What are irrational numbers?

Back

Irrational numbers are numbers that cannot be expressed as a simple fraction; they have non-repeating, non-terminating decimal expansions.

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.

Front

What is the approximate value of √6?

Back

Approximately 2.45.

Front

What is the approximate value of √8?

Back

Approximately 2.83.

Front

How do you round a number to the nearest tenth?

Back

Look at the hundredths place; if it's 5 or more, round up the tenths place by one.

Front

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

Back

Approximately 5.3.

Front

Which set of numbers contains an irrational number?

Back

{0.17, √3, 2.555..., √4} contains √3, which is irrational.

Front

What is the value of √35 between which two whole numbers?

Back

Between 5 and 6.