Okay. It's simple addition alright, but the pieces don't move, do they? So you need to select them in a certain order (there are many solutions)
It helps if you write the values down on paper, using normal numbers. Think like this: What number on the top row, added to which number in the middle row, yields which answer on the bottom row. More:
The bars are five, and the dots are one. So, the groups you need to find are 12 + 1 = 13; 20 + 2 = 22; 14 + 9 - 23; and 13 + 8 = 21. You must find these groups, but you can find them in any order.
That will be ten Dramoi.