What's 9+10
the answer is 21 obviously
NO IT IS 109
coz basically as alway explain this is that 9 *10 is 90 so 90 - 10= 80 and 80-9=71 and 71-10=61 and 61-10=51 and 51-10=41 and 41-10= 31 and 31-10=21 and 21+10 is 31 and 31-10+21, and kaboom you got the answer
hope this helps
