Rational / Irrational Numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b is not zero.

Front

What is an irrational number?

Back

An irrational number is a number that cannot be expressed as a simple fraction; it cannot be written as a ratio of two integers.

Front

Is the number 14.26486905836237849574362785 rational or irrational?

Back

Irrational

Front

Is the number 8.1010101010101010101010 rational or irrational?

Back

Rational

Front

Is the fraction 5/27 rational or irrational?

Back

Rational

Front

True or False: Irrational numbers can be written as fractions.

Back

False

Front

True or False: Terminating decimals are irrational numbers.

Back

False

Front

What is an example of a rational number?

Back

1/2, 0.75, or 3 (which can be written as 3/1).

Front

What is an example of an irrational number?

Back

√2, π (pi), or e (Euler's number).

Front

What is a terminating decimal?

Back

A terminating decimal is a decimal that has a finite number of digits after the decimal point.