What is an addition expression?

An addition expression is an equation without an equals sign (=)

An example of an addition expression is 2+3. And that's it! Very simple!

more examples:

2+8

2+6

6+1

4+1

9+1239759736493856

7824501287565240564929384658834765+7569276520972809742659258215

Get it now?