1.  找规律想一想，填一填。                                        

9=1×9 108=12×9 11106=1234×9 =123456×9 =1234567×9 =12345678×9 =123456789×9

81=9×9 882=98×9 8883=987×9 88884=9876×9  =987654×9 88888887=