![](http://www.alamy.com/thumbs/6/408FD6AD-3E6B-4878-8E62-39497051D616/HAPCKT.jpg)
sliderule
Size: 4752px × 3168px
Photo credit: © Zoonar/Andre Bonn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: abakus, algebra, ausrechnen, bunt, finanzen, hilfe, kalkulation, kugeln, lernen, mathematik, pisa, rechenhilfe, rechenschieber, rechentafel, rechner, schieber, schule, sliderule, taschenrechner