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Error in Subtraction with V4.0??

  • To: mathgroup at smc.vnet.net
  • Subject: [mg22463] Error in Subtraction with V4.0??
  • From: beintinc at aol.com (BEIntInc)
  • Date: Wed, 8 Mar 2000 02:22:00 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com
Can someone please explain why

1. - .999999999999

results in 
9.999778782798785*10^-13

The old way (by hand) gives me 

1x10^-12

Is this an error or am I missing something?

TIA,

John Brooks
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