问题
解答题
计算: (1)(
(2)(-1)3×(-5)÷[(-3)2+2×(-5)]. |
答案
(1)原式=-
×12-1 4
×12+1 6
×12,1 2
=-3-2+6
=1;
(2)原式=(-1)×(-5)÷[9-10]
=5÷[-1]
=-5.
计算: (1)(
(2)(-1)3×(-5)÷[(-3)2+2×(-5)]. |
(1)原式=-
×12-1 4
×12+1 6
×12,1 2
=-3-2+6
=1;
(2)原式=(-1)×(-5)÷[9-10]
=5÷[-1]
=-5.