# What is summation notation?

##### 1 Answer

Jun 25, 2015

Summation is a shorthand way for writing long additions.

#### Explanation:

Say you want to add all numbers up to and including 50.

Then you could write out:

(If you really write this out in full, it'll be a long line of numbers).

With this notation you would write:

Meaning: sum up all the numbers

The

Another example:

If you want to add all the squares from

You see that this