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If you subtract a negative number from another number, you always get a bigger number. That is because minus a minus is a plus. So you could subtract any negative number from 10 and
http://wiki.answers.com/Q/What_could_you_subtract_...
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49F - (-54F) = 49F + 54F = 103F. Subtracting a negative number is the same thing as adding it.
http://answers.yahoo.com/question/index?qid=201001...
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