问题 解答题
用简便方法计算下面各题
25×1.25×32
73.8×16-7.38×601.25+
5
4
×0.4+125%÷
5
8
答案

(1)25×1.25×32,

=25×1.25×4×8,

=(25×4)×(1.25×8),

=100×10,

=1000;

(2)73.8×16-7.38×60,

=7.38×160-7.38×60,

=7.38×(160-60);

=7.38×100,

=738;

(3)1.25+

5
4
×0.4+125%÷
5
8

=1.25+1.25×0.4+1.25×1.6,

=1.25×(1+0.4+1.6),

=1.25×3,

=3.75.

单项选择题
单项选择题