3.94+34.3乘0.2=3.94+6.86=4-0.06+7-0.14=11-0.2=10.8
4.8乘100.1=4.8*(100+0.1)=4.8*100+4.8*0.1=480+0.48=480.48
9.5乘101=9.5*100+9.5*1=950+9.5=959.5
3.8乘10.1=3.8*10+3.8*0.1=38+0.38=38.38
12.5乘8.8=12.5*8+12.5*0.8=100+10=110