Scratch Addition
Page 3 of 6

OK, now let's do the tens column...  It's going to work the same way.  Work along with me so you don't get lost!

Let's finish it off!  What do we do with those scratches?

So, our final answer is 478.

Don't feel bad if your head is swimming a bit.  These guys are easy, but look confusing at first.  Go to the next page and we'll do another one!