简便计算54321×12345-54322×12344

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简便计算54321×12345-54322×12344
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简便计算54321×12345-54322×12344
简便计算54321×12345-54322×12344

简便计算54321×12345-54322×12344
原式=54321×12345-(54321+1)×12344
=54321×12345-54321×12344-12344
=54321×(12345-12344)-12344
=54321-12344
=41977