567*789789－789*567567

567*789789－789*567567 567 乘789789减789乘567567,怎样做简便 123+234+354-456+567-678+789 321321*789-789789*321 要用简便方法.另外还有一道：1999+999*999 987－789= 巧算【789+789789+789789789】/【987+987987+987987987】1-2/3-2/9-2/27-2/81-2/243 123+234+345-456+567-678+789-890怎么做这道题 123+234+345+456+567+678+789+900=? 123+234+345+456+567+678+789+890+73874837487400+? 123+234+345+456+567+678+789+890+901=? （555+567×789）分之（568×789-234）再-123分之1求简便算式, 567×235－300分之267＋567×234 excel怎么整行按规则排序 789,123,345,567 456,678,234,123排列成：123,345,567,789 123,234,456,678 123+234+345+456+567+678+789越简便越好 巧算 123+234+345—456+567+678+789—890快,今天交 用简便方法计算:123+234+345+456+567+678+789急 123+234+345+456+567+678+789简便算法*代表乘号 123加234加345加456加567加678加789怎么巧算