Comments on: Magic Brain Calculator built a long long time ago

By: Nunyo Bidness

Nunyo Bidness — Mon, 07 Feb 2011 19:26:55 +0000

I bought my first one of these at a drug store in the early 1970s, before I was 10. I credit it with my brain really grokking number theory and how things fit together.

Just as multiplication is handled as successive additions at different orders of magnitude, division can be approximated as successive subtractions. But you’re not going to get more than an integer quotient and a remainder unless you really work at it.

I picked one up, new in packaging, on eBay less than 10 years ago for less than $10.

By: Fitria

Fitria — Wed, 19 Jan 2011 09:56:51 +0000

nice i wish i could use it

By: Christopher

Christopher — Tue, 08 Sep 2009 21:00:37 +0000

I have one for aution on ebay!! Check it out.. 9-8-09

By: Matthew

Matthew — Fri, 22 Feb 2008 14:04:55 +0000

Do you mean this one over here http://www.gadgetvenue.com/mechanical-calculator-02051046/

I believe it probably works with the same principles but is just built differently.

By: Dave Doolin

Dave Doolin — Fri, 22 Feb 2008 13:58:19 +0000

Is this like a simple Curta calculator?