问题 解答题

计算:

(1)-8-(-1)-(+5);

(2)15-[1-(-20-4)].

答案

(1)-8-(-1)-(+5)

=-8+1-5

=-13+1

=-12;

(2)15-[1-(-20-4)]

=15-[1-(-24)]

=15-(1+24)

=15-25

=-10.

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