Fast operations

  • Thread starter bxluth
  • Start date
  • #1
I know that there are some shortcuts to make math operations. For example
When you multiply 11 and another number (23 for exaple) you just write those two numbers like this:

2 3

and then sum them "2+3=5" and the result you write it in the middle:
2 5 3

and that's it.

Can you help me and write those kind of shortcuts, it would really help, thanx :smile:
 

Answers and Replies

  • #2
Ambitwistor
841
1
You might want to look for a book entitled, The Trachtenberg Speed System of Basic Mathematics.
 

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