Abacus/Manual/Quick use/Multiplication

From Wikibooks
< Abacus‎ | Manual‎ | Quick use
Jump to navigation Jump to search

Multiplication with an abacus may not be so much easier than a calculator for a begginer, but with an expert the abacus can be much faster than pressing a whole bunch of buttons. First, to multiply, you take your original number and then you "multiply" by adding more of your original number until you have one less than the number your multipling by. Heres an example:

  • 2x3=6
111011 110x
110111 110=
111101 101

or in other words:

  • 2+2+2=6
111011 110+
111011 110+
111011 110=
111101 101

Practice those till you understand the concept. It should start getting easier if you imagine that your just adding three two's or five six's or whatever combination.