问题 解答题

计算下列各题,能简算的要简算.12%

50×0.125×0.02×80.8×(4-3.75)×9.90.81×99+0.8125×(85+85+85+85)

答案

(1).50×0.125×0.02×8,

=(50×0.02)×(0.125×8),

=1×1,

=1;

(2).0.8×(4-3.75)×9.9,

=0.8×0.25×9.9,

=0.2×9.9,

=0.2×(10-0.1),

=0.2×10-0.2×0.1,

=2-0.02,

=1.98;

(3)0.81×99+0.81,

=0.81×99+0.81×1,

=0.81×(99+1),

=0.81×100,

=81;

(4)25×(85+85+85+85),

=25×4×85,

=100×85,

=8500.

选择题
单项选择题 A1/A2型题