4 9 9 12如何等于24
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4 9 9 12如何等于24
![4 9 9 12如何等于24](/uploads/image/z/3448273-49-3.jpg?t=4+9+9+12%E5%A6%82%E4%BD%95%E7%AD%89%E4%BA%8E24)
1: 4 × (9 + 9 - 12)
2: 4 × ((9 + 9) - 12)
3: 4 × (9 + (9 - 12))
4: 4 × (9 - 12 + 9)
5: 4 × ((9 - 12) + 9)
6: 4 × (9 - (12 - 9))
7: (4 - 12 ÷ 9) × 9
8: (4 - (12 ÷ 9)) × 9
9: 9 × (4 - 12 ÷ 9)
10: 9 × (4 - (12 ÷ 9))
11: (9 + 9 - 12) × 4
12: ((9 + 9) - 12) × 4
13: (9 + (9 - 12)) × 4
14: (9 - 12 + 9) × 4
15: ((9 - 12) + 9) × 4
16: (9 - (12 - 9)) × 4
2: 4 × ((9 + 9) - 12)
3: 4 × (9 + (9 - 12))
4: 4 × (9 - 12 + 9)
5: 4 × ((9 - 12) + 9)
6: 4 × (9 - (12 - 9))
7: (4 - 12 ÷ 9) × 9
8: (4 - (12 ÷ 9)) × 9
9: 9 × (4 - 12 ÷ 9)
10: 9 × (4 - (12 ÷ 9))
11: (9 + 9 - 12) × 4
12: ((9 + 9) - 12) × 4
13: (9 + (9 - 12)) × 4
14: (9 - 12 + 9) × 4
15: ((9 - 12) + 9) × 4
16: (9 - (12 - 9)) × 4