Definitions [4]
Number: Number is an arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations.
Positive Numbers: A positive number is one that is greater than zero. These are written as 1, 2, 3, … or with a ‘+’ sign as +1, +2, +3, … (though the ‘+’ is usually omitted).
Negative Number: A negative number is a number less than zero and is written with a ‘−’ sign, such as −1, −2, −3, …
A number line is a visual tool used to represent all types of numbers, including integers, fractions, and decimals.
- Integers: Numbers like −23, 0, 8
- Non-integers: Numbers like `3/5`, \[\sqrt{2}\], `5/2`
The numbers −1, −2, −3, … (to the left of zero) are negative numbers or negative integers, and the numbers 1, 2, 3, … (to the right of zero) are positive numbers or positive integers.
Hence, the new set of numbers …, −3, −2, −1, 0, 1, 2, 3,… are called integers.
