The Real Number System

Front

What are natural numbers?

Back

Natural numbers are the set of positive integers starting from 1: 1, 2, 3, 4, ...

Front

What is an example of an irrational number?

Back

An example of an irrational number is a non-repeating, non-terminating decimal like 5.72314.....

Front

Classify the number -23.

Back

-23 is classified as an integer, rational, and real number.

Front

Classify the number 3.

Back

3 is classified as a natural number, whole number, integer, rational, and real number.

Front

What is an integer?

Back

An integer is a whole number that can be positive, negative, or zero, such as -3, 0, or 5.

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 the difference between whole numbers and natural numbers?

Back

Whole numbers include all natural numbers plus zero: 0, 1, 2, 3, ... whereas natural numbers start from 1.

Front

What are real numbers?

Back

Real numbers include all rational and irrational numbers, encompassing integers, fractions, and decimals.

Front

Is -9 an integer?

Back

Yes, -9 is an integer.

Front

What is an example of a rational number?

Back

An example of a rational number is 1/2 or 0.75.