(0.98*99+0.98)/49 用简便方法做

来源：学生作业学帮网编辑：学帮网时间：2024/05/29 13:28:59

(0.98*99+0.98)/49
=((1-0.02)*(100-1) + 0.98)/49
=(100 - 2 -1 + 0.02 + 0.98)/49
= (97 + (0.02 + 0.98))/49
=(97 + 1)/49
=98/49
=2