Arithmetic/Introduction to Operations

There are four basic operators, which are used to work with numbers for uses besides counting. They are:

• $+$ addition
• $-$ subtraction
• $\times$ multiplication (The symbols * and ⋅ are also used to multiply)
• $÷$ division (The symbol / is also used to divide)

Addition

Addition is the total of two numbers. For example:

$1+2=3$

Subtraction

Subtraction is the opposite of addition, which is the taking away of one number from another. For example:

$2-1=1$

Multiplication

Multiplication is the adding of a number a certain number of times. So:

$2*1=2$

$2*2=2+2=4$

$2*3=2+2+2=6$ etc.

Division

Division is the splitting of a number into a number of equal parts. For example:

$6/2=3$