问题 解答题
计算下面各题,能简便计算的要简算
125×882008×99+200877-7.5+23-2.5
520-360÷40×2(520-360÷40)×2(520-360)÷(40×2)
答案

(1)125×88,

=125×(8×11),

=125×8×11,

=1000×11,

=11000;

(2)2008×99+2008,

=2008×(99+1),

=2008×100,

=200800;

(3)77-7.5+23-2.5,

=(77+23)-(7.5+2.5),

=100-10,

=90;

(4)520-360÷40×2,

=520-9×2,

=520-18,

=502;

(5)(520-360÷40)×2,

=(520-9)×2,

=511×2,

=1022;

(6)(520-360)÷(40×2),

=160÷80,

=2.

单项选择题 共用题干题
单项选择题