用简便方法计算:19.98*37-199.8*1.9+1998*0.82

来源:学生作业学帮网 编辑:学帮网 时间:2024/05/15 18:42:56

用简便方法计算:19.98*37-199.8*1.9+1998*0.82

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