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Precision

• To: mathgroup at smc.vnet.net
• Subject: [mg129335] Precision
• From: Rob Ryan <tio540s1 at gmail.com>
• Date: Sat, 5 Jan 2013 02:19:25 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• Delivered-to: l-mathgroup@wolfram.com
• Delivered-to: mathgroup-newout@smc.vnet.net
• Delivered-to: mathgroup-newsend@smc.vnet.net

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!

• Follow-Ups:
  • Re: Precision
    • From: Andrzej Kozlowski <akozlowski@gmail.com>
  • Re: Precision
    • From: Tomas Garza <tgarza10@msn.com>
  • Re: Precision
    • From: Bob Hanlon <hanlonr357@gmail.com>