六年級簡算題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
123456+654321-123456+654321
252735232
123456+654321等於多少
111111111
12345×123456=?123456×1234567=?
1524064320