- Books, Literature, and Writing
Managing Multiplication by Eleven
Multiplication by 11 is so easy to do
keep reading along and let me teach you
11 times any 2 digit number for example 26
Is the problem I'll first show you how to fix
Take the 2 and the 6 and add them together for 8
Stick 8 in between and your product is great !
Yep 286 is the correct sum
But, wait cause we are not done
Suppose you are factoring 11 times 85
Total of 8 plus 5 is 13 you arrive
3 still in the middle and 1 adds to 8
Practice on paper what here I state
8 plus 1, 3 in the middle then 5
The correct answer is 935 !
This math trick works factors 11 to 99
Try it with all, you'll see it's divine !
Remember this is only for number 11s use
Tried on any other number leads only to abuse.