[quote=KatherinWinter]
"You may do them mentally. If the answers are wrong I will have you show me how you came to the answer you got." the housekeeper told him.
[/quote]

"Understood." 
The boy returned to his paper, a few strands of dark hair escaping his hair tie and falling in his face. He was a bit too focused on completing the task to really pay much attention to it at the moment, though. The first few problems were easy enough to do without writing out the steps, though he did have to write out the steps for addition and subtraction for most numbers past three digits. Two perpendicular rows with the numbers, a few dots between them, and a few circles later, even those could be dealt with quickly. He gave a small smile before moving on to simple multiplication and division.