soroban

Example with subtracting 128 from 237

1. Put 237 onto the soroban, then starting with the hundreds column: 2-1=1

   1a
   _____________________________________
    |o o o o o o o o o o o o o o o | |...

3. going to the hundreds column:  2-1=1
          -|
        _  _  __
         ) _)  /
        /_ _) /
          _   _
   ___  |  ) (_)
        | /_ (_)
      ___________
           _  _
        | | |...

Lesson 2 (from llizard's bbackwards sschool of soroban)

Example with subtracting 128 from 237

traditional method:

1. starting in the ones column:  7-8=9 (take one from the tens column...)

        ...

   3b:
   _____________________________________
    |o o o o o o o o o o o o o o o | o|
    ||_|_|_|_|_|_|_|_|_|_|_|_|_|_|_o_||
    || | | | | | | | | | | | | | o o o|
    |e o o o o o o o o o o o o o...

Adding 153 to 39 with the soroban:

1. Put 153 onto the soroban, then starting with the hundreds column: 1+0=1
(89 is less than 100 so zero is the number in the 100's column for it)
   _______________...

From llizard aka ejm:

Example with the numbers 153 and 39

traditional western method:

1. starting in the ones column:  3+9=12, carry the 1
           |
           _  _
        | |_  _)
        |  _...

*Hug*     *Hug*    *Hug*     *Hug*          *Hug*
*Hug*     *Hug*    *Hug*     *Hug*       *Hug* *Hug*
*Hug*     *Hug*    *Hug*     *Hug*      *Hug*   *Hug*
*Hug*     *Hug*    *Hug*     *Hug*     *Hug...

                                                "not without a washer"
    __ __                                        __ ___  /
   /__/  \                                      /__/ _ \
   |__| (((((...

       ______
      /__(___)
     //
     ||               "Those seeing-eye dogs
     ||                 are amazing. That is
     ||                 certainly a beautiful
     ||                    ...