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I'm looking for software that can serve as a replacement for a physical "scratch pad", on a Windows system with only keyboard and touchpad interfaces. This is intended to facilitate manual calculations, but not actually do any computation.

$\LaTeX$ is good for some things, but I haven't found an easy way to do things like vertical addition/subtraction/multiplication/division with the same speed & comfort as I might do on a scratch pad.

Excel and Notepad can serve the purpose, but they're a bit clumsy at it. Paint could do, but is not so great to use without a mouse.

Is there any purpose-built "scratch pad" software out there? Or, are there other workarounds I might not have thought of which work well on a laptop with no regular mouse?

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    I think you are in the wrong SE board. Your question is not a mathematical one.2012-11-14
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    @IttayWeiss I posted the question in chat, and was told there are already similar questions for other mathematical software requests here - so, presumably, this would be acceptable.2012-11-14
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    @IttayWeiss: [Help Center > Asking](http://math.stackexchange.com/help/on-topic) says that questions about "software that mathematicians use" are on-topic. This appears to fall in that category.2013-08-23

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