Answer:

-1

Step-by-step explanation:

step1) First take all the negative numbers aside and positive numbers a side.

step2)-205+205+80-55-25-1

step3)Here 205 and -205 will be canceled.and addition of 55 and 25 is 80.so, 80 and -80 we be cancelled.

step4)hence answer is -1.

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