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Errors with decimal addition in Mathematica 5.0

• To: mathgroup at smc.vnet.net
• Subject: [mg47416] Errors with decimal addition in Mathematica 5.0
• From: yupeng_ at hotmail.com (Peng Yu)
• Date: Sat, 10 Apr 2004 02:01:21 -0400 (EDT)
• Sender: owner-wri-mathgroup at wolfram.com

In[1]:= 13505.5 - 244.91
Out[1]= 13260.6

However,13505.5 - 244.91 = 13260.59. "N" doesn't help, either.

In[25]:= N[13505.50 - 244.91]
Out[25]= 13260.6

But the following command gives the correct answer.
In[26]:= 505.50 - 244.91
Out[26]= 260.59

How can I get the correct last digit? Thanks!

• Follow-Ups:
  • Re: Errors with decimal addition in Mathematica 5.0
    • From: Murray Eisenberg <murray@math.umass.edu>