1 3 9 10四个数加减乘除得24gg

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1 3 9 10四个数加减乘除得24gg
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1 3 9 10四个数加减乘除得24gg
1 3 9 10四个数加减乘除得24
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1 3 9 10四个数加减乘除得24gg
1, 3, 9, 10的24点答案:
1: (1 + 10) × 3 - 9
2: ((1 + 10) × 3) - 9
3: (3 × (1 + 10)) - 9
4: 3 × (1 + 10) - 9
5: (3 × (10 + 1)) - 9
6: 3 × (10 + 1) - 9
7: (10 + 1) × 3 - 9
8: ((10 + 1) × 3) - 9

(1 + 10) × 3 - 9=24

好天才啊都..我做不出...