Question

Multiplication trick of 11 by Muhammad:

Hi friends this is trick with you can multiply by 11 in seconds
Example:
24*11=

Add 2+4=6
then insert 6 between in 2 and 4=264

Another example:

55*1=605

1st step: Add both numbers
5+5=10
then insert 10 between 55 in this we have add
5+105
605 answer. You can check by using calculator..

Comments please.

Answer 1

anyway nice :)

Answer 2

the 2nd example is vague

Answer 3

also how would you use it in something like 100 * 11

Answer 4

nys..

Answer 5

thanks for sharing, there are many methods out there.
here is one i like to share

12
x 34
------

1. multiply starting from right vertical
2*4 = 8


12
x 34
------
8
2. cross multiply top digit and bottom digit and add together " carry a digit if need"

(1* 4 ) + (2*3) = 10

1 <-------- the carry digit
12
x 34
------
0 8

3. multiply the the vertical left. " add the carry digit if there is one"

(3*1 )+1 = 4

1 <-------- the carry digit
12
x 34
------
4 0 8


this work with all 2 digit multiplication