Instant Multiplication : Quick Multiply Hacks | In 2 Seconds |

 INSTANT MULTIPLICATION

Let’s begin with one of my favorite feats of mental math—how

to multiply, in your head, any two-digit number by eleven. It’s

very easy once you know the secret. Consider the problem:

32 x
11

To solve this problem, simply add the digits, 3 + 2= 5, put the 5 between the 3 and the 2, and there is your answer:

352

What could be easier? Now you try:

53
x 11

Since 5 +3 = 8, your answer is simply

583

One more. Without looking at the answer or writing any-

thing down, what is

81 x 11?

Did you get 891? Congratulations!

Now before you get too excited, I have shown you only half

of what you need to know. Suppose the problem is

85 x 11

Although 8 + 5 =13
, the answer is NOT 8135!

As before, the 3
goes in between the numbers, but the 1
needs to be added to the 8 to get the correct answer:

935

Think of the problem this way:

1

835

935