Chapter 1: Numbers, 1.1: Number System

Learn about different types of numbers, including natural, whole, integer, rational and irrational numbers, as well as decimals and their properties.

What are natural numbers?

Positive counting numbers starting from 1

What are whole numbers?

Natural numbers including 0

What are integers?

Positive and negative whole numbers, including 0

What are rational numbers?

Numbers that can be written as a fraction of two integers

What are irrational numbers?

Numbers that cannot be written as a fraction of two integers

What is a terminating decimal?

A decimal that ends

What is a recurring decimal?

A decimal where a digit or group of digits repeats forever

Give an example of a natural number

1,2,3...

Give an example of a whole number

,1,2,3,...

Give an example of an integer

...-2,-1,0,1,2,...

Give an example of a rational number

-3.7, -1/2,0,77,100 2/3,0.222

Give an example of a irrational number

π,√2,e,Sin25°

Are all natural numbers integers?

Yes

Is 0 a whole number?

Yes

Is −3 an integer?

Yes