Date: Dec 7, 2012 1:00 AM
Author: Jonathan Crabtree
Subject: Re: Ways kids can make and build prime numbers. Re: A Good Activity
Multiplaying is perhaps the game invented by the Legendary Hindoo King Algor.
In this game, you play by pairing a COUNTER number with a REPEATER number as is C.R or the other way, R.C yet never C.C nor R.R.
Then when playing with your toys, you do 3(the Count) x 2(the Repeater) by adding a count of 3 to itself (R-1) times to get 3C + 3C or a count of 6.
So to do 4 x 3 it becomes 4C + 4C + 4C or a count of 12. Four times three is four added to itself twice as we start with a four.
The 'et' sign or 'and' sign or 'plus' sign (ie +) is a pictogram showing two line segments added once together where the vertical in the + sign is the point of addition.
When you add two numbers, they are added or joined ONCE to combine the two numbers or line segments into one.
That is why there is always one less addition sign than you have addends.
CR = The sum of C added to itself R-1 times.
After India invented the zero number (Thank you!) the multiplay game was made even simpler!
Instead of having to remember the 'R-1' repeater rule the multiplay rule became...
CR = The sum of C added to ZERO R times.
What a wonderful gift!