问题
解答题
计算: (1)-16+23+(-17)-(-7) (2)-2
(3)-33-(
(4)(-1)100×|-5|-4×(-3)-42. |
答案
(1)原式=-16+23-17+7=30-33=-3;
(2)原式=-2
+1 2
×1 2
×1 2
=-28 3
+1 2
=-2 3
;11 6
(3)原式=-27+12+20-14=-9;
(4)原式=1×5+12-16=5+12-16=1.