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How do I solve this -40--40=?

 Mar 16, 2017
 #1
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How do I solve this -40--40=?

 

\( -40\ -\ -40=(-40)-(-40)=-40+40=0\)

 

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 Mar 16, 2017
 #2
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It is an inverse operation, therefore the answer is 0

 Mar 17, 2017

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