问题 解答题

8.4×2.5+7.18

5.81-0.25×1.6

0.8×630×0.125.

答案

(1)8.4×2.5+7.18,

=21+7.18,

=28.18;

(2)5.81-0.25×1.6,

=5.81-(0.25×4)×0.4,

=5.81-1×0.4,

=5.81-0.4,

=5.41;

(3)0.8×630×0.125,

=(0.8×0.125)×630,

=0.1×630,

=63.

选择题
单项选择题