@misc{noauthor_yacs:_2013-2,
	title = {{YACS}: {A} simple multiplication on the {Curta} mechanical calculator},
	shorttitle = {{YACS}},
	url = {http://www.youtube.com/watch?v=Y1witCGVEIw&feature=youtube_gdata_player},
	abstract = {Demo of a multiplication on the Curta mechanical calculator.

We calculate 1259 * 298 = 375182

After setting 1259 on the setters we can calculate in a few different ways.
Each example includes restoring the crank to ADD-mode and the carriage to the x1 position. 


1 Do it the dumb way and wear out the Curta
- Crank of 298 times.

a total of 298 actions.


A better way is:
- crank 8 times
- move carriage to the x10 position
- crank 9 times
- move carriage to the x100 position
- crank 2 times
- move carriage to the x1 position

a total of 22 actions.


A much better way (as shown in the video) is:
- observe that 298 * 1259 equals ( 300 - 2 ) * 1259
- move carriage to the x100 position
- crank 3 times
- move carriage to the x1 position
- pull crank for SUB mode
- crank 2 times
- push crank for ADD-mode

a total of 9 actions.


A bit of thinking saves time and wear and tear on the Curta.

Created with YACS ( Yet Another Curta Simulator )

To play with the real model visit:

http://members.chello.nl/o.veenstra3/vrml/curta\_info/curta\_demo.html},
	urldate = {2013-12-09},
	month = jul,
	year = {2013},
}

{"_id":"wCSb59f3tdEkqZaS3","bibbaseid":"anonymous-yacsasimplemultiplicationonthecurtamechanicalcalculator-2013","downloads":0,"creationDate":"2017-12-18T12:34:22.665Z","title":"YACS: A simple multiplication on the Curta mechanical calculator","author_short":null,"year":2013,"bibtype":"misc","biburl":"http://bibbase.org/zotero/arithmometre.org","bibdata":{"bibtype":"misc","type":"misc","title":"YACS: A simple multiplication on the Curta mechanical calculator","shorttitle":"YACS","url":"http://www.youtube.com/watch?v=Y1witCGVEIw&feature=youtube_gdata_player","abstract":"Demo of a multiplication on the Curta mechanical calculator. We calculate 1259 * 298 = 375182 After setting 1259 on the setters we can calculate in a few different ways. Each example includes restoring the crank to ADD-mode and the carriage to the x1 position. 1 Do it the dumb way and wear out the Curta - Crank of 298 times. a total of 298 actions. A better way is: - crank 8 times - move carriage to the x10 position - crank 9 times - move carriage to the x100 position - crank 2 times - move carriage to the x1 position a total of 22 actions. A much better way (as shown in the video) is: - observe that 298 * 1259 equals ( 300 - 2 ) * 1259 - move carriage to the x100 position - crank 3 times - move carriage to the x1 position - pull crank for SUB mode - crank 2 times - push crank for ADD-mode a total of 9 actions. A bit of thinking saves time and wear and tear on the Curta. Created with YACS ( Yet Another Curta Simulator ) To play with the real model visit: http://members.chello.nl/o.veenstra3/vrml/curta_info/curta_demo.html","urldate":"2013-12-09","month":"July","year":"2013","bibtex":"@misc{noauthor_yacs:_2013-2,\n\ttitle = {{YACS}: {A} simple multiplication on the {Curta} mechanical calculator},\n\tshorttitle = {{YACS}},\n\turl = {http://www.youtube.com/watch?v=Y1witCGVEIw&feature=youtube_gdata_player},\n\tabstract = {Demo of a multiplication on the Curta mechanical calculator.\n\nWe calculate 1259 * 298 = 375182\n\nAfter setting 1259 on the setters we can calculate in a few different ways.\nEach example includes restoring the crank to ADD-mode and the carriage to the x1 position. \n\n\n1 Do it the dumb way and wear out the Curta\n- Crank of 298 times.\n\na total of 298 actions.\n\n\nA better way is:\n- crank 8 times\n- move carriage to the x10 position\n- crank 9 times\n- move carriage to the x100 position\n- crank 2 times\n- move carriage to the x1 position\n\na total of 22 actions.\n\n\nA much better way (as shown in the video) is:\n- observe that 298 * 1259 equals ( 300 - 2 ) * 1259\n- move carriage to the x100 position\n- crank 3 times\n- move carriage to the x1 position\n- pull crank for SUB mode\n- crank 2 times\n- push crank for ADD-mode\n\na total of 9 actions.\n\n\nA bit of thinking saves time and wear and tear on the Curta.\n\nCreated with YACS ( Yet Another Curta Simulator )\n\nTo play with the real model visit:\n\nhttp://members.chello.nl/o.veenstra3/vrml/curta\\_info/curta\\_demo.html},\n\turldate = {2013-12-09},\n\tmonth = jul,\n\tyear = {2013},\n}\n\n","key":"noauthor_yacs:_2013-2","id":"noauthor_yacs:_2013-2","bibbaseid":"anonymous-yacsasimplemultiplicationonthecurtamechanicalcalculator-2013","role":"","urls":{"Paper":"http://www.youtube.com/watch?v=Y1witCGVEIw&feature=youtube_gdata_player"},"metadata":{"authorlinks":{}},"html":""},"search_terms":["yacs","simple","multiplication","curta","mechanical","calculator"],"keywords":[],"authorIDs":[],"dataSources":["3ENPFoLZgTfyxFgps"]}