7.8乘以0.6+0.42,
问题描述:
7.8乘以0.6+0.42,
答
7.8*0.6+0.42=(8-0.2)*0.6+0.42 =8*0.6-0.2*0.6+0.42 =4.8-0.12+0.42 =5.1
7.8乘以0.6+0.42,
7.8*0.6+0.42=(8-0.2)*0.6+0.42 =8*0.6-0.2*0.6+0.42 =4.8-0.12+0.42 =5.1