1- 16-2 times (minus one quarter) equals-16- (minus one half) equals-16+ one half equals minus 15 and one half.

2 2× (minus 27)+34 equals minus 54+34 equals minus 20.

3 2× (negative 27)- (negative 12)+ 15 equals negative 54- (negative 12)+ 15 equals negative 54+ 12+ 15 equals negative 27.

The third question below is wrong.

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