问题
解答题
计算题: (1)12+(-7
(2)(-
(3)(
(4)(-1)3+[(-3)2+(3-22)×2]. |
答案
(1)原式=12-7
+18-32.51 2
=30-40
=-10;
(2)原式=(-
)×3×3×(-3 5
)10 9
=6;
(3)原式=(
-5 8
+1 6
)×(-24)7 12
=-15+4-14
=-25;
(4)原式=-1+[9+(3-4)×2]
=-1+(9-2)
=-1+7
=6.