0.72+0.18乘0.09等于多少?简便计算
问题描述：
0.72+0.18乘0.09等于多少?简便计算
答
0.72+0.18*0.09 （0.72+0.18）*0.09
=0.72+0.18*0.1-0.18*0.01 =0.9*0.09
=0.72+0.018-0.0018 =0.081
=0.7362