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=4分之11乘以5分之31+5分之14除以11分之4+4分之11(把小數形式都化成分數形式)=4分之11乘以5分之31+5分之14乘以4分之11+4分之11(把中間那部分化成乘號)=20分之(31x11)+20分之(14x11)+20分之(5x11)(通分…
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