12×(7-1)÷3=24
1: (7 - 1) ÷ 3 × 12
2: ((7 - 1) ÷ 3) × 12
3: (7 - 1) ÷ (3 ÷ 12)
4: (7 - 1) × 12 ÷ 3
5: ((7 - 1) × 12) ÷ 3
6: (7 - 1) × (12 ÷ 3)
7: 12 ÷ 3 ×(7 - 1)
8: (12 ÷ 3) × (7 - 1)
9: 12 ÷ (3 ÷ (7 - 1))
10: (12 × (7 - 1)) ÷ 3
11: 12 × (7 - 1) ÷ 3
12: 12 × ((7 - 1) ÷ 3)
12*(7-1)/3
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