I also memorized it by that adding both numbers together you would get 9.
Here's one way to memorize the nines multiplication table. First, write the numbers 1-8 from top down in a column like so...Then, in the next column, write the numbers 1-8 going upward, and you're done!With this anyone could memorize it easily!Awesome, Dai-chan!I have no idea!I know, right! Well then, pop quiz: what's nine times two?