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五上數學習作今天就要急要答案跟算式

Jan 13th 2015, 08:51

〈1〉5分之8+1又10分之1=
〈2〉3分之5+1又5分之1=
〈3〉42分之36=※用2 3 5 10做約分約到不能再約為止
〈4〉6公里長的水溝疏通工程需要花9日6時，1公里的疏通工程平均要花幾日幾時？

就這些謝謝送10點

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