12345乘185减12346乘184简便运算

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12345乘185减12346乘184简便运算12345乘185减12346乘184简便运算12345乘185减12346乘184简便运算12345*185-12346*184=12345*185-(

12345乘185减12346乘184简便运算
12345乘185减12346乘184简便运算

12345乘185减12346乘184简便运算
12345*185-12346*184
=12345*185-(12345*184+184)
=12345*(185-184)-184
=12345-184
=12161

12345*185-12346*184=(12345*184+12345*1)-12346*184=12345*1-(12345-12346)*184
=12345+(12346-12345)*184
=12345+184=12429