简便计算218217*217218-217217*218218
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简便计算218217*217218-217217*218218简便计算218217*217218-217217*218218简便计算218217*217218-217217*218218218217×
简便计算218217*217218-217217*218218
简便计算218217*217218-217217*218218
简便计算218217*217218-217217*218218
218217×217218-217217×218218
=(218218-1)×217218-217217×218218
=218218×217218-217218-217217×218218
=218218×(217217+1)-217218-217217×218218
=218218×217217+218218-217218-217217×218218
=218218-217218
=1000
=218217*(217217+1)-(218217+1)*217217=218217*217217+218217-218217*217217-217217=218217-217217=1000