Sum

Sum

About

The quantity, sum total, or result of adding two or more numbers.

Count:
Un-arranged values are: $2, 6, 1, 3, 3$

Re-arranged values $1,2,3,3,6$ [although rearranging numbers is not necessary this is still a great habit to have]

We use the sigma "∑" symbol for totaling the sum:

Example

step by step: 

1. calculate the sum total (add all the numbers)

For example: $1+2+3+3+6$

2. ∑ = $15$