One of the easiest multiplication tricks that I know of is also one of the most impressive. It is the multiplication of two-digit numbers, and, like many othermath tricks, there is an easy rule that you can use to solve problems of this sort very quickly in your head.
An Example:
44 x 11
The technique for quickly solving multiplication problems involving any two-digit number by 11 is easy to remember. Simply add the two digits and insert the result in between the two digit number.
In our example:
44 x 11
4 + 4 = 8, so simply insert “8” between “4” and “4”:
484
So then we have quickly found that
44 x 11 = 484
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