问题 解答题

用简便方法计算下面各题.

(1)1500-28-272

(2)99×48+48

(3)2000÷125÷8

(4)77+2.14+23+7.86.

答案

(1)1500-28-272,

=1500-(28+272),

=1500-300,

=1200;

(2)99×48+48,

=(99+1)×48,

=100×48,

=4800;

(3)2000÷125÷8,

=2000÷(125×8),

=2000÷1000,

=2;

(4)77+2.14+23+7.86,

=(77+23)+(2.14+7.86),

=100+10,

=110.

单项选择题
填空题