✔ 最佳答案
過程:(345+87)=432
238x1768=420784
432-420784=-420354
-420354+5466=-414888
-414888-98.443-340=-(414888+98.443+340)=415326.443
得:(345+87)-238x1768+5466-98.443-340=415326.443
2012-02-18 12:27:42 補充:
過程:(345+87)=432
238x1768=420784
432-420784=-420364
-420364+5466=-414898
-414898-98.443-340=-(414898+98.443+340)=415324.443
得:(345+87)-238x1768+5466-98.443-340=415324.443