A-A+
计算:(1)3×(-5)=______;(2)(-5)×(-4)=______;(3)-2×
问题详情
计算:
(1)3×(-5)=______;
(2)(-5)×(-4)=______;
(3)-2×0=______;
(4)(-2
(5)(-1)×(-2)×(-3)=______;
(6)(-3)×(2)×(-5)=______.
参考答案
(1)3×(-5),
=3×5,
=15;
(2)(-5)×(-4),
=5×4,
=20;
(3)-2×0=0;
(4)(-213)×914,
=-73×914,
=-32;
(5)(-1)×(-2)×(-3),
=-1×2×3,
=-6;
(6)(-3)×(+2)×(-5),
=3×2×5,
=30.
故答案为:15;20;0;-32;-6;30.
考点: