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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Precision
Replies: 3   Last Post: Jan 7, 2013 11:05 PM

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PA32R

Posts: 4
Registered: 7/18/11
Precision
Posted: Jan 5, 2013 2:17 AM
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My frustration is growing. I simply want to add (for example):
103971.66+52282.64+2998.27. These are dollars and cents and I'd like to keep the cents. But when I input that line, I get 159923. When I input: N[(103971.66+52282.64+2998.27),20] I STILL get 159923. What do I do to get 159952.57? I've used "SetPrecision", etc. with still no result.
I note that when I type 103971.66 and hit shift-return, the output is 103972. If I then type "InputForm[%]" I get 103971.66.

There simply has to be an easy way to add these numbers - any calculator watch can do it!



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