3.25*7.8+3.25*0.21+0.325=0.325*78+0.325*2.1+0.325=0.325*(78+2.1+1)=0.325*81.1=26.3575 请注意4195上楼的答案做错了
0.325/2.5+3.97用简便方法计算
3.25*7.8+3.25*0.21+0.325=0.325*78+0.325*2.1+0.325=0.325*(78+2.1+1)=0.325*81.1=26.3575 请注意4195上楼的答案做错了