7.3×9.9+0.73=7.3×9.9+7.3×0.1=7.3×(9.9+0.1)=7.3×10=73
7.3×9.9+0.73简便计算？解:原式=7.3×9.9+7.3×0.1→(7.3×0.1=0.73)=7.3×(9.9+0.1)=7.3×10=73
7.3×9.9+0.73=0.73×99+0.73=0.73×（99+1）=0.73×100=73
