问题 解答题

计算下面各题,怎样算简便就怎样计算.

3618÷45+1620

(2.5×8)÷(0.1-0.09)

1000÷32÷0.25÷1.25.

答案

(1)3618÷45+1620,

=80.4+1620,

=1700.4;

(2)(2.5×8)÷(0.1-0.09),

=20÷0.01,

=2000;

(3)1000÷32÷0.25÷1.25,

=1000÷(32×0.25×1.25),

=1000÷(4×8×0.25×1.25),

=1000÷[(4×0.25)×(8×1.25)],

=1000÷(1×10),

=1000÷10,

=100.

单项选择题
单项选择题