275期：大围：04,05,06,08,09,10,11,12,17,19,20,21,25,27,28,33,37,38,40,41,43,44,45,48（共半数）开41准
276期：大围：02,03,04,12,14,16,22,23,24,25,26,27,30,31,33,34,36,39,43,44,45,46,47,48（共半数）开29错
277期：大围：04,05,07,08,10,12,13,16,17,20,22,23,26,28,30,33,34,37,40,41,43,45,46,49（共半数）开26准
278期：大围：01,03,06,07,08,09,14,16,18,19,20,27,28,30,31,32,33,36,38,39,42,43,47,48（共半数）开07准
279期：大围：01,02,03,04,07,08,09,11,12,13,18,20,23,24,26,29,30,33,37,38,39,41,42,48（共半数）开40错
280期：大围：04,07,09,10,15,18,22,23,25,27,28,29,30,32,36,37,38,39,41,42,44,46,47,48（共半数）开22准
281期：大围：02,05,07,10,11,13,16,18,19,21,22,24,25,26,27,33,34,35,39,40,41,42,43,46（共半数）开？？√【？中？】