**[arch3/_private/calc1_ahdr.htm]**## Re: Olivetti Underwood Divisumma 24

**From: **Mark Glusker

**Email: **glusker@yahoo.com

### Comments

Here's a quick summary of how to use the basic functions of the D24, with the buttons on the machine shown in square brackets. Normal position of the switches is: AUT TOT to the left, REP to the right, small lever below keyboard
should be up.
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Addition: (equation: 2+3+5=10) press 2 [D+] 3 [D+] 5 [D+] [T] ----- Subtraction: (equation: 10-5-3=2) press 10 [D+] 5 [-] 3 [-] [T] -----Multiplication: (equation: 2x3=6) press 2 [X] 5 [=] (this is the green equals key) -------Division: (equation: 10/5=2) press 10 [D+] 5 [=:] (this is an equals sign combined with a colon) ----- Chain multiplication: (equation: 2x3x5=30) press 2 [x] 3 [TR] 5 [=] ----- Good luck!

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