1: (12 - 9) × 12 - 12
2: [(12 - 9) × 12] - 12
3: (12 × (12 - 9)) - 12
4: 12 × (12 - 9) - 12
12-9=3 3*12=36 36-12=24
(12-9)*12-12=24
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1: (12 - 9) × 12 - 12
2: [(12 - 9) × 12] - 12
3: (12 × (12 - 9)) - 12
4: 12 × (12 - 9) - 12
12-9=3 3*12=36 36-12=24
(12-9)*12-12=24
标签: