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| publisher = Adventure International
| part = PHM 3041
| programmer = Scott Adams
| format = [[:Category:Solid State Software Command Module|Solid State Software Command Module]]<sup>TM</sup> & Floppy Disk
| released = 1981
=External Links=
* [http://www.computinghistoryvideogamehouse.org.uk/det/22082/Addition-and-Subtraction-1/ Centre for Computing History: Addition and Subtraction 1]* [http:net/gamemain/www.elisoftware.orgcartsab/index.php?title=Addition_And_Subtraction_1_(TI99%5C4A,_Cartridge)_Texas_Instruments_-_1981_USA,_Canada_Releaseadventure/ Eli's Software EncyclopediaVideo Game House: Addition and Subtraction 1Adventure]* [https://www.retroplace.com/en/games/7542--addition-and-subtraction-1/ Retroplace: Addition and Subtraction 1][[Category:Software]][[Category:Solid State Software Command Module]]
[[Category:Software]]
[[Category:Solid State Software Command Module]]
