(1)(280160)÷40(2)280160÷40(3)808÷8129《答案》(1)11 (2)284 (3)230
14-8614-7( )14-6( )14-5( )14-4( )14-3( )《答案》7891011
(1)(500-428)×5(2)26056×40《答案》(1)360 (2)2500
12-3912-4( )12-5( )12-6( )12-7( )12-8( )《答案》87654
921193( )94( )95( )96( )97( )《答案》1213141516