EX:
534
+ 153
___
687
so the way that I have done this is that I put the 1s together aka 3 4 and that made 7 then I put that under the line the I ad the 10s which is 3 and the 5 and that made 8. next Put it next to the 7. Last I put the 5 and the 1 together and that made 6 Next you put it all together and then you get you 687 as your final answer.
