Question

4.8×9.9 怎么简便计算？

Answer 1

4.8*9.9=(5-0.2)*(10-0.1)=50-0.5-2+0.02=47.52

Answer 2

解:原式=4.8*10-4.8*0.1=47.52

Answer 3

4.8*(10-0.1)=48-0.48=47.52

Answer 4

4.8*10-4,8*0,1=48-0,48=47.52