问题
解答题
(1)8+(-10)+(-2)-(-5); (2)(-2)÷
(3)-24×(-
(4)(-3)2+[20-(-2)3]÷(-3). |
答案
(1)原式=8-10-2+5
=1;
(2)原式=-2×3×(-3)
=18;
(3)原式=-24×(-
)-24×1 2
-24×(-3 4
)1 3
=12-18+8
=2;
(4)原式=9+(20+8)÷(-3)
=9-28 3
=-
.1 3