Have you ever wondered why some people were so good in math that they almost never needed a calculator? Well the truth is, they have a technique, and one of those techniques is called the Trachtenberg System. This system, although lengthy, consists of a number of readily memorized operations , which, in turn, allow one to perform arithmetic computations very quickly. If you're in the mood for math facts take our quiz and see how much facts you know about this technique.
With multiplication
With addition
With subtraction
With division
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To find an answer in 10 seconds.
To find an answer in a matter of seconds.
To find an answer 1 digit at a time.
To find an answer 3 digits at a time.
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To keep each stage of the operation distinct.
To move from the first digits to the next.
To cancel easy single digits easily.
To see the bigger picture in a matter of seconds.
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By starting at the first significant digit and moving right.
By starting at the first significant digit and moving left.
By starting at the last significant digit and moving right.
By starting at the last significant digit and moving left.
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Neighbor
Integer
The whole number
A digit
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You triple each digit, from right hand side.
You double each digit, from left hand side.
You double each digit, from right hand side.
You triple each digit, from left hand side.
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You substract the rightmost digit from 5
You substract the leftmost digit from 10
You substract the rightmost digit from 10
You substract the rightmost digit from 3
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For the leading 0, you subtract 1 from half of the neighbor.
For the leading 5, you subtract 1 from half of the neighbor.
For the leading 0, you subtract 5 from half of the neighbor.
For the leading 0, you subtract 1 from the neighbor.
4
3
8
12
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To multiply by 22
To multiply by 1
To add the digit to its neighbor.
To multiply by 5.5
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