Question

7,8,9,10 每个数字只能用一次，怎么样凑成24点？

可以+；—；×；÷。数学好的人算算~

Answer 1

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

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Answer 2

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

Answer 3

8*9/(10-7)

Answer 4

9/(10-7)*8=24

Answer 5

7+8+9