问题
解答题
计算: (1)-2×7×(-4)×(-2.5). (2)
(3)(-4)×499.7×
|
答案
(1)原式=-(2×7×4×2.5)=-140;
(2)原式=
×2 3
×24×9 7
=36;7 4
(3)原式=0.
计算: (1)-2×7×(-4)×(-2.5). (2)
(3)(-4)×499.7×
|
(1)原式=-(2×7×4×2.5)=-140;
(2)原式=
×2 3
×24×9 7
=36;7 4
(3)原式=0.