问题
解答题
计算: (1)(-12)-5+(-14)-(-39) (2)2-2÷
(3)(
(4)-14-(1-0.5)×
|
答案
(1)(-12)-5+(-14)-(-39)
=-12-5-14+39
=8;
(2)2-2÷
×31 3
=2-6×3
=2-18
=-16;
(3)(
+5 12
-2 3
)×(-12)3 4
=-5-8+9
=-4;
(4)-14-(1-0.5)×
×[2-(-3)2]1 3
=-1-
×1 2
×[2-9]1 3
=-1-
×1 2
×[-7]1 3
=-1+7 6
=
.1 6