654321×123456-654322×123455用简便方法怎么做?
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根据ax(b+1)-(a+1)xb=ab+a-ab-b=a-b
654321×123456-654322×123455
=654321-123455
=530866
654321×123456-654322×123455
=654321-123455
=530866
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654321×123456-654322×123455
=654321×(123455+1)-(654321+1)×123455
=654321×123455+654321×1-654321×123455-1×123455
=654321-123455
=530866
=654321×(123455+1)-(654321+1)×123455
=654321×123455+654321×1-654321×123455-1×123455
=654321-123455
=530866
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654321*123456-654322*123455
=654321*123456-(654321+1)*123455
=654321*(123456-123455)-123455
=654321-123455
=530866
=654321*123456-(654321+1)*123455
=654321*(123456-123455)-123455
=654321-123455
=530866
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=654321*123456-(654321+1)*123455
=654321*123456-654321*123455-1*123455
=654321*(123456-123455)-123455
=654321*1-123455
=654321-123455
=530866
=654321*123456-654321*123455-1*123455
=654321*(123456-123455)-123455
=654321*1-123455
=654321-123455
=530866
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654321×123456-654322×123455
=654321×(123455+1)-(654321+1)×123455
=654321×123455+654321-654321×123455-123455
=654321-123455
=530866
=654321×(123455+1)-(654321+1)×123455
=654321×123455+654321-654321×123455-123455
=654321-123455
=530866
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