Traditional Abacus and Bead Arithmetic/Resources for contributors
Some simple tools
editThis book makes heavy use of abacus procedure tables like:
Abacus | Comment |
---|---|
ABCDEFGHIJKLM | |
4567890123 | Entering radicand starting in CD (first group) |
2 | First root digit in B |
-4 | Subtract square of B from first group |
2 567890123 | Null remainder |
4 567890123 | Doubling B. Appending next group to remainder |
41 567890123 | 5/4≈1, try 1 as next root digit |
-4 | Continue division by 41, subtract 1✕41 from EF |
-1 | |
41 157890123 | 15 as remainder |
42 157890123 | Double second root digit |
42 157890123 | Append next group |
423157890123 | 157/42≈3, try 3 as next root digit |
-12 | Continue division by 423, subtract 3✕423 from E-H |
-06 | |
-09 | |
423 30990123 | 309 as remainder |
426 30990123 | Double third root digit |
426 30990123 | Append next group |
etc. |
and could also be enhanced by using some abacus diagrams here and there like this one:
A | B | C | D | E | F | G | H | I | K | J | L | M | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
9 | 18 | 9 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 9 | 9 | 9 |
If you plan to contribute to this book, you may find some simple tools located at User:Jccsvq/Abacus diagrams and procedure tables that may make some of these tasks easier for you. (Jccsvq (discuss • contribs) 05:46, 22 August 2021 (UTC))