问题 解答题
用自己喜欢的方法计算下面各题.
1.28+0.86+38.720.45÷0.6÷0.532×0.25×1.25
0.78÷0.13×0.213.6×9+40.6÷21.08×0.8÷0.27.
答案

(1)1.28+0.86+38.72,

=(1.28+38.72)+0.86,

=40+0.86,

=40.86;

(2)0.45÷0.6÷0.5,

=0.45÷(0.6×0.5),

=0.45÷0.3,

=1.5;

(3)32×0.25×1.25,

=8×4×0.25×1.25,

=(4×0.25)×(1.25×8),

=1×10,

=10;

(4)0.78÷0.13×0.2,

=6×0.2,

=1.2;

(5)13.6×9+40.6÷2,

=122.4+20.3,

=142.7;

(6)1.08×0.8÷0.27,

=0.864÷0.27,

=3.2.

单项选择题
单项选择题