问题
解答题
计算:
(1)(-61)-(-71)-|-8|-(-2);
(2)3-[(-3)-(+12)];
(3)(3-5)-(6-10).
答案
(1)(-61)-(-71)-|-8|-(-2),
=-61+71-8+2,
=-69+73,
=4;
(2)3-[(-3)-(+12)],
=3-(-3-12),
=3-(-15),
=3+15,
=18;
(3)(3-5)-(6-10),
=-2-(-4),
=-2+4,
=2.