问题 解答题
怎样简便就怎样算.
125×25×322300-165-3525×204125×(8+4)
3200÷25÷456×32-46×32432÷54+17×5499×78+78.
答案

(1)125×25×32,

=125×25×(8×4),

=(125×8)×(25×4),

=1000×100,

=100000;

(2)2300-165-35,

=2300-(165+35),

=2300-200,

=2100;

(3)25×204,

=25×(200+4),

=25×200+25×4,

=5000+100,

=5100;

(4)125×(8+4),

=125×8+125×4,

=1000+500,

=1500;

(5)3200÷25÷4,

=3200÷(25×4),

=3200÷100,

=32;

(6)56×32-46×32,

=(56-46)×32,

=10×32,

=320;

(7)432÷54+17×54,

=8+918,

=926;

(8)99×78+78,

=(99+1)×78,

=100×78,

=7800.

选择题
填空题