Grandma's mathematicaltrick

How to learn easily the multiplication table of          9  (nine) . 

Hello my dear friends 

I know many of my friends are aware about this small trick. But i think just to share this with you all. 

When I was in small classes, my grandmother used to teach me all subjects. She was a teacher. During the lessons, she tells me some simple tricks like this. Let me start.... Check below. 

Multiplication table of 9 

9*1= 09

9*2= 18

9*3= 27

9*4= 36

9*5= 45

9*6= 54

9*7= 63

9*8= 72

9*9=  81

9*10= 90

Look at the beginning of the multiplication table, we can see the sum starting like 09,18,27......The first digit of the sum goes like 0,1,2,3,4....(ascending order)  and the second digit of the sum goes like 9,8,7,6,5 (descending order) ....

Did you get me ? Then please comment.

Below giving a small illustration.