分数加减法怎么算方法异分母分数

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select * from tbl_Articles WHERE ArticleID=127803 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=127803 LIMIT 0,1
select * from tbl_Articles_sphinx where id=127803 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1110572,1110812,1084441,1120233,1083952,1056046,1132547,1067695,1082067,1124845,1062034,1116455,1081197,1124281,1127461,1129909,1106118,1109977,1045342,1112768,1069473,1113514,1115267,1062324,1093611,1131703,1078354,1098525,1104947,1124849) ORDER BY field (ArticleID,1110572,1110812,1084441,1120233,1083952,1056046,1132547,1067695,1082067,1124845,1062034,1116455,1081197,1124281,1127461,1129909,1106118,1109977,1045342,1112768,1069473,1113514,1115267,1062324,1093611,1131703,1078354,1098525,1104947,1124849)