(55*102-102*53)*(78*5) 的简便算法
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(55*102-102*53)*(78*5) 的简便算法
![(55*102-102*53)*(78*5) 的简便算法](/uploads/image/z/16371528-24-8.jpg?t=%2855%2A102-102%2A53%29%2A%2878%2A5%29+%E7%9A%84%E7%AE%80%E4%BE%BF%E7%AE%97%E6%B3%95)
(55*102-102*53)*(78*5)
=102(55-53)*78*5
=102*2*5*78
=102*780
=(100+2)*780
=78000+1560
=79560
=102(55-53)*78*5
=102*2*5*78
=102*780
=(100+2)*780
=78000+1560
=79560