66乘107减65乘27的简便计算

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66乘107减65乘27的简便计算
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66乘107减65乘27的简便计算
66乘107减65乘27的简便计算

66乘107减65乘27的简便计算
66×107-65×27
=65×107+107-65×27
=65×(107-27)+107
=65×80+107
=520+107
=627

66*107-65*27
=66*(27+80)-65*27
=66*27+66*80-65*27
=(65+1)*27+66*80-65*27
=65*27+27+66*80-65*27
=27+66*80
=27+(60+6)*80
=27+60*80+6*80
=27+4800+480
=27+5280
=5307

66×107-65×27=65×(107-27)+107=5307

66X107-65X27
=(65+1)X107-65X27
=65X107+1X107-65X27
=65X(107-27)+107
=65X80+107
=5307