三个五，一个一？
1: 5 × 5 - 1 × 12: (5 × 5) - 1 × 13: (5 × 5 - 1) × 14: ((5 × 5) - 1) × 15: 5 × 5 -(1 × 1)6: (5 × 5) - (1 × 1)7: 5 × 5 - 1 ÷ 18: (5 × 5) - 1 ÷ 19: (5 × 5 - 1) ÷ 110: ((5 × 5) - 1) ÷ 111: 5 × 5 -(1 ÷ 1)12: (5 × 5) - (1 ÷ 1)13: 5 × 5 × 1 - 114: (5 × 5) × 1 - 115: (5 × 5 × 1) - 116: ((...全部
1: 5 × 5 - 1 × 12: (5 × 5) - 1 × 13: (5 × 5 - 1) × 14: ((5 × 5) - 1) × 15: 5 × 5 -(1 × 1)6: (5 × 5) - (1 × 1)7: 5 × 5 - 1 ÷ 18: (5 × 5) - 1 ÷ 19: (5 × 5 - 1) ÷ 110: ((5 × 5) - 1) ÷ 111: 5 × 5 -(1 ÷ 1)12: (5 × 5) - (1 ÷ 1)13: 5 × 5 × 1 - 114: (5 × 5) × 1 - 115: (5 × 5 × 1) - 116: ((5 × 5) × 1) - 117: (5 × (5 × 1)) - 118: 5 × (5 × 1) - 119: 5 × 5 ÷ 1 - 120: (5 × 5) ÷ 1 - 121: (5 × 5 ÷ 1) - 122: ((5 × 5) ÷ 1) - 123: (5 × (5 ÷ 1)) - 124: 5 × (5 ÷ 1) - 125: (5 + 1) × (5 - 1)26: (5 - 1) × (5 + 1)27: 5 × 1 × 5 - 128: (5 × 1) × 5 - 129: (5 × 1 × 5) - 130: ((5 × 1) × 5) - 131: (5 × (1 × 5)) - 132: 5 × (1 × 5) - 133: 5 ÷ 1 × 5 - 134: (5 ÷ 1) × 5 - 135: (5 ÷ 1 × 5) - 136: ((5 ÷ 1) × 5) - 137: (5 ÷ (1 ÷ 5)) - 138: 5 ÷ (1 ÷ 5) - 139: (5 - 1) × (1 + 5)40: (1 + 5) × (5 - 1)41: 1 × 5 × 5 - 142: (1 × 5) × 5 - 143: (1 × 5 × 5) - 144: ((1 × 5) × 5) - 145: (1 × (5 × 5)) - 146: 1 × (5 × 5) - 147: 1 × (5 × 5 - 1)48: 1 × ((5 × 5) - 1。
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