问题补充说明:(987*655-321)/(666+987*654)*4.5/0.25
(987*655-快321)/(666+987*654)*4.5/0.25
=(987*654+987-321)/(666+987*654)*(4.5×4)
=(987*654+666)/(666+987*654)*18
=18
问题补充说明:(987*655-321)/(666+987*654)*4.5/0.25
(987*655-快321)/(666+987*654)*4.5/0.25
=(987*654+987-321)/(666+987*654)*(4.5×4)
=(987*654+666)/(666+987*654)*18
=18
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