问题 解答题
125×(7×8)25×(7+4)50×25×4×20
85×6758×41-58.
答案

(1)125×(7×8),

=125×8×7,

=1000×7,

=7000;

(2)25×(7+4),

=25×7+25×4,

=175+100,

=275;

(3)50×25×4×20,

=(50×20)×(25×4),

=1000×100,

=100000;

(4)85×67,

=(80+5)×67,

=80×67+5×67,

=5360+335,

=5695;

(5)58×41-58,

=58×41-58×1,

=58×(41-1),

=58×40,

=2320.

单项选择题
单项选择题