用简便方法计算:19.98*37-199.8*1.9+1998*0.82

2024-12-29 01:40:38
推荐回答(1个)
回答1:

19.98*37-199.8*1.9+1998*0.82
=1998*0.37-1998*0.19+1998*0.82
=1998*(0.37-0.19+0.82)
=1998*1
=1998