问题 解答题

2.005×390-20.05×41+200.5×0.2.

答案

2.005×390-20.05×41+200.5×0.2,

=20.05×39-20.05×41+20.05×2,

=20.05×(39+2-41),

=0.

单项选择题
单项选择题