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六年级简算题654321*123456-654322*123455
六年级简算题654321*123456-654322*123455
1回答
2020-04-26 10:42
六年级简算题654321*123456-654322*123455
六年级简算题654321*123456-654322*123455
654321×123456-654322×123455
=654321×(1+123455)-(654321+1)×123455
=654321×1+654321×123455-654321×123455-1×123455
=(654321×123455-654321×123455)+(654321×1-1×123455)
=0+530866
=530866