问题
解答题
计算. (1)(-2)×(-
(2)(-0.1)×1000×(-0.01); (3)2.3×4.1×0×(-7); (4)(-
|
答案
(1)原式=-(2×
×3)=-3;1 2
(2)原式=0.1×1000×0.01=1;
(3)原式=0;
(4)原式=-(
×1 2
×2 3
×3 4
)=-9 8
.9 32
计算. (1)(-2)×(-
(2)(-0.1)×1000×(-0.01); (3)2.3×4.1×0×(-7); (4)(-
|
(1)原式=-(2×
×3)=-3;1 2
(2)原式=0.1×1000×0.01=1;
(3)原式=0;
(4)原式=-(
×1 2
×2 3
×3 4
)=-9 8
.9 32