Question

4.72*0.42+5.8*0.472的简便方法？

Answer 1

解：4.72×0.42+5.8×0.472=4.72×0.42+5.8×0.1×4.72=4.72×0.42+0.58×4.72=4.72×0.42+4.72×0.58=4.72×(0.42+0.58)=4.72×1=4.72

Answer 2

4.72×0.42+5.8×0.472
=4.72×0.42+0.58×4.72
=4.72×（0.42+0.58）
=4.72×1
=4.72

Answer 3

简便计算方法如下：

4.72×0.42+5.8×0.472

=4.72×0.42+0.58×4.72

=4.72×（0.42+0.58）

=4.72×1

=4.72

Answer 4

使用换位法，将4.72*0.42+5.8*0.472换成0.472*4.2+5.8*0.472，再运用乘法分配律，0.472*（4.2+5.8）=4.72。