简便计算9.9X5.6+0.56
问题描述:
简便计算9.9X5.6+0.56
4.4X5.5-44X0.33+0.44X22
答
9.9*5.6+0.56=9.9*5.6+0.1*5.6=(9.9+0.1)*5.6=56
简便计算9.9X5.6+0.56
4.4X5.5-44X0.33+0.44X22
9.9*5.6+0.56=9.9*5.6+0.1*5.6=(9.9+0.1)*5.6=56