How to times any number by 11

How to times any number by 11 between 1-99:)


EXAMPLE

 Take 63x11 for example.

You can not do it in your head can you?
If you can then wow! I can but that's because I know how.

Anyway.
6+3=9
Stick the 9 in the middle of the number

693!!!!! DO IT ON A CALCULATOR IF YOU CAN :)

What about 83x11?

Well, 8 plus 3 is 11. BUT the answer wont be 8113!
You add the 10's

8+1=9 So the 8 becomes a 9. Then stick the 1 in the middle and the 3 at the end.

913- Wasn't that hard, was it?

EXERCISE

78X11
61X11
34X11
47X11
79X11
64X11
52X11
18X11
37X11
99X11

LEAVE THEM IN THE COMMENTS BELOW, SHOW WORKING IF YOU CAN/WANT.

Thanks for reading xox