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计算:(1)3×(-5)=______;(2)(-5)×(-4)=______;(3)-2×

2022-08-15 11:59:38 问答库 阅读 205 次

问题详情

计算:
(1)3×(-5)=______;
(2)(-5)×(-4)=______;
(3)-2×0=______;
(4)(-21

3

)×9

14

=______;
(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.

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