问题 解答题

直接写出计算结果:

(1)(-6)+(-7)=______;

(2)(-6)-(-7)=______;

(3)(-6)+7=______;

(4)-6-7=______;

(5)-(-2)2=______;

(6)-23+(-3)2=______.

答案

(1)(-6)+(-7)=-13;

(2)(-6)-(-7)=-6+7=1;

(3)(-6)+7=-6+7=1;

(4)-6-7=-13;

(5)-(-2)2=-4;

(6)-23+(-3)2=-8+9=1.

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