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5/14÷4/21×6/25

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5/14÷4/21×25分之16 =15/8×25分之16 =1又5分之1 你好,本题已解答 如满意,请点采纳答案

5/4×8+8×1/4 =8×(5/4+1/4) =8×6/4 =12

原式=(5×21×3)/(14×25×4)=(3×3)/(2×5×4)=9/40

14/5÷21/4×25/16 =14/5×4/21×25/16 =14/5÷21/4×25/16 =5/6。

5/14÷4/21×2/3=5/14×21/4×2/3 14与21消去7 变成了5/2×3/4×2/3 3和3消掉 2和2消掉 这变成了5/4

5/14÷4/21×16/25 =5/14×21/4×16/25 =5/6

5/14*21/4*16/25=42/35

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