Thanks everyone for replying.

I noticed that DS is in a hurry if he is completing the task. He will not read the problem completely. He also does not want to pick up a pencil but work out everything in the head. Some where in the process gets distracted where multiple steps are involved and gets lost.

The problems that he is trying to do are not very simple, he needs to read and slow down and focus. Once he gets these down it gets much easier.

He comes up with cool math logic and performs calculations without using his fingers while I am hiding my hand behind the back to use my fingers for calculations smile

Its just so strange that you can see such differences in the same child doing something that his brain can figure out so easily.