0.63乘20.1简便方法
问题描述:
0.63乘20.1简便方法
答
0.63x20.1
=(0.5 + 0.13)(20+0.1)
=0.5x20+0.5x0.1+0.13x20+0.13x0.1
=1+0.05+2.6+0.013
=12.663