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What is 45 - 50 - (-12)?

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2 Answers

45 - 50 - (-12) 
 
-(-) is the same as -1*(-1). So multiply first.
 
= 45 - 50 + 12
 
 
To avoid confusion in the Order of operation:
 
45 - 50 + 12
 
= 45 + (-50) + 12
 
= 7