Q.    Subtract the number which is successor of 27 from the number which is the predecessor of -39 

Dear student
Successor of 27 is 27+1= 28Predecessor of -39 is -39-1=-40So, Predecessor of -39-Successor of 27=-40-28=-68
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-37+(-28)=-65
 
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successor of 27: 28
prec.of -39:-38

-38-28 (it will be add )
-66
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