问题 解答题
脱式计算,能简算的一定要简算.
1.25×167.6×0.5-0.0512.8×10.18.75×0.25×0.4.
答案

(1)1.25×16

=1.25×8×2,

=10×2,

=20;

(2)7.6×0.5-0.05

=3.8-0.05,

=3.75;

(3)12.8×10.1

=12.8×(10+0.1),

=12.8×10+12.8×0.1,

=128+1.28,

=129.28.

(4)8.75×0.25×0.4

=8.75×(0.25×0.4),

=8.75×0.1,

=0.875.

单项选择题
判断题