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用4,7,9,1算24点怎么算

你好,用1,4,7,9算24点,共有4种算法。 1.﹙4-7﹚×﹙1-9﹚ 2.﹙1-9﹚×﹙4-7﹚ 3.﹙9-1﹚×﹙7-4﹚ 4.﹙7-4﹚×﹙9-1﹚

1: 4 × (7 + 8 - 9) 2: 4 × ((7 + 8) - 9) 3: 4 × (7 + (8 - 9)) 4: 4 × (7 - 9 + 8) 5: 4 × ((7 - 9) + 8) 6: 4 × (7 - (9 - 8)) 7: 4 × (8 + 7 - 9) 8: 4 × ((8 + 7) - 9) 9: 4 × (8 + (7 - 9)) 10: (4 + 8) × (9 - 7) 11: 4 × (8 - 9 + 7) 12...

只用加减乘除无解,加上根号或阶乘则可,如: 10×1+7×√4=24 [(10+7-1)÷4]!=4!=24

1. ﹙9+7﹚× 6 ÷ 4 2. ﹙9+7﹚÷ 4 × 6 3. ﹙7+9﹚÷﹙4 ÷ 6﹚

1. ﹙9-1﹚×﹙4-1﹚ 2. ﹙4-1﹚×﹙9-1﹚ 3. ﹙1-9﹚×﹙1-4﹚

8 ÷ 4 x 7 +10 = 24 你好,这是百度“ 知道专家部特约专家”的回答,有什么不明白的地方可以追问,满意请采纳

第一步: 7-4=3 第二步: 1+7=8 第三步: 3×8=24

1, 2, 4, 7的24点答案: 1: (1 - 2 + 7) × 4 2: ((1 - 2) + 7) × 4 3: (1 - (2 - 7)) × 4 4: (1 + 4 + 7) × 2 5: ((1 + 4) + 7) × 2 6: (1 + (4 + 7)) × 2 7: (1 + 7 - 2) × 4 8: ((1 + 7) - 2) × 4 9: (1 + (7 - 2)) × 4 10: (1 + 7 + 4) × 2 1...

1: (6 × (7 + 9)) ÷ 4 2: 6 × (7 + 9) ÷ 4 3: 6 × ((7 + 9) ÷ 4) 4: 6 ÷ 4 ×(7 + 9) 5: (6 ÷ 4) × (7 + 9) 6: 6 ÷ (4 ÷ (7 + 9)) 7: 6 ÷ 4 ×(9 + 7) 8: (6 ÷ 4) × (9 + 7) 9: 6 ÷ (4 ÷ (9 + 7)) 10: (6 × (9 + 7)) ÷ 4 11: 6 × (9 + 7) ÷ 4 12: ...

(7-4)x(9-1)=3x8=24

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