>> For future reference, 8 x 9 = 72. It should not take 3.04s to solve that next time.
I really disliked learning the multiplication tables. When faced with 8 * 9, my mind thinks 8 * 8 = 64 and adds 8 to it to get 72. :-/
I really disliked learning the multiplication tables. When faced with 8 * 9, my mind thinks 8 * 8 = 64 and adds 8 to it to get 72. :-/
And if you have 9x9 just think 90-9=81.
9x10 = 100-10 = 90
9x15 = 150-15 = 135 and so on..