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  • 1 # 使用者4426198074816

    你好!用1,2,5,7算24點,共有70種演算法。

    2×[5+﹙7÷1﹚] ﹙2×1﹚×﹙7+5﹚ ﹙7+1﹚×﹙5-2﹚ [﹙7-2﹚×5]-1 [﹙7+5﹚×1]×2 2×[﹙5×1﹚+7] [﹙5+7﹚×2]÷1 2×[7+﹙5÷1﹚] ﹙5-2﹚×﹙1+7﹚ ﹙1+7﹚×﹙5-2﹚ 2×[﹙5+7﹚×1] [2×﹙7+5﹚]÷1 ﹙7+5﹚×﹙2÷1﹚ 2×[﹙5÷1﹚+7] [﹙5+7﹚÷1]×2 2×[5+﹙1×7﹚] 2×[7+﹙5×1﹚] 1×[﹙5+7﹚×2] 1×[﹙7+5﹚×2] ﹙1×2﹚×﹙7+5﹚ [2×﹙7+5﹚]×1 [﹙7+5﹚÷1]×2 2×[﹙7+5﹚÷1] ﹙2×1﹚×﹙5+7﹚ 1×[2×﹙5+7﹚] [﹙5÷1﹚+7]×2 [﹙7+5﹚×2]×1 ﹙7+5﹚÷﹙1÷2﹚ 2÷[1÷﹙7+5﹚] 2×[1×﹙5+7﹚] 2×[﹙1×5﹚+7] [﹙7÷1﹚+5]×2 2÷[1÷﹙5+7﹚] [﹙5+7﹚×2]×1 ﹙7+5﹚×﹙1×2﹚ [2×﹙5+7﹚]÷1 ﹙2÷1﹚×﹙5+7﹚ [7+﹙5÷1﹚]×2 ﹙5+7﹚×﹙2×1﹚ [﹙1×7﹚+5]×2 ﹙7+5﹚×﹙2×1﹚ [7+﹙1×5﹚]×2 2×[﹙7+5﹚×1] [﹙1×5﹚+7]×2 [﹙5+7﹚×1]×2 2×[﹙1×7﹚+5] [1×﹙5+7﹚]×2 2×[1×﹙7+5﹚] 2×[﹙7×1﹚+5] [5×﹙7-2﹚]-1 [5+﹙7÷1﹚]×2 ﹙5+7﹚×﹙1×2﹚ [5+﹙7×1﹚]×2 2×[5+﹙7×1﹚] [7+﹙5×1﹚]×2 [﹙7×1﹚+5]×2 [﹙5×1﹚+7]×2 ﹙1×2﹚×﹙5+7﹚ [1×﹙7+5﹚]×2 ﹙5+7﹚×﹙2÷1﹚ 2×[﹙5+7﹚÷1] [﹙7+5﹚×2]÷1 ﹙5+7﹚÷﹙1÷2﹚ 2×[﹙7÷1﹚+5] [2×﹙5+7﹚]×1 ﹙2÷1﹚×﹙7+5﹚ 1×[2×﹙7+5﹚] [5+﹙1×7﹚]×2 ﹙5-2﹚×﹙7+1﹚ 2×[7+﹙1×5﹚]

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