18.768*9.9+18.76 怎么用简便方法
问题描述:
18.768*9.9+18.76 怎么用简便方法
答
(18.76+0.008)×9.9+18.76=18.76×9.9+0.008×9.9+18.76×1=18.76×(9.9+1)+0.0792=187.6+16.884+0.0792=204.5632
18.768*9.9+18.76 怎么用简便方法
(18.76+0.008)×9.9+18.76=18.76×9.9+0.008×9.9+18.76×1=18.76×(9.9+1)+0.0792=187.6+16.884+0.0792=204.5632