Question

78878+6678-321*998-54787+(6878+777-666)=

Answer 1

9966x6十6678x18
=（3322x3）+6678x18
=3322x18+6678x18
=（3322+6678）x18
=10000x18
=180000
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（987*654*666+987*655）/666-321=
[(987*655-987)*666+987*655]/666-321=
[(987*655*666-987*666)+987*655]/666-321=
[(987*655*667)-987*666]/666-321=
(987*655*667)/666-987-321=
430334367/666
(987*655—321)/（666+987*654）
=(987*654+987-321)/(666+987*654)
=(987*654+666)/(666+987*654)
=1
9996×6+6678×18
=（3332×3）×6+6678×18
=3332×（3×6）+6678×18
=3332×18+6678×18
=10010×18
=180180