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Old 11-09-2011, 08:22 AM  
Si
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Join Date: Feb 2008
Posts: 13,900
Different calculators follow different orders of operations. Most non-scientific calculators without a stack work left to right without any priority given to different operators, for example giving

1 + 2 X 3 = 9

while more sophisticated calculators will use a more standard priority, for example giving

1 + 2 X 3 = 7
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