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1,2,5,9算24点

(1+5)×(9-5)=24

二乘九等于十八,十八加五再加一等于24

1: (1 + 2) × (9 - 1) 2: (2 + 1) × (9 - 1) 3: (9 - 1) × (1 + 2) 4: (9 - 1) × (2 + 1)

1. [2+﹙9+1﹚]×2 2. [﹙9+1﹚+2]×2 3. 2×[﹙9+2﹚+1]

7+((9*2)-1) (7+(9*2))-1 7+((2*9)-1) (7+(2*9))-1 ((7*2)+9)+1 (7*2)+(9+1) ((7*2)+1)+9 (7*2)+(1+9) 7-(1-(9*2)) (7-1)+(9*2) 7-(1-(2*9)) (7-1)+(2*9) 9+((7*2)+1) (9+(7*2))+1 9+((2*7)+1) (9+(2*7))+1 ((9*2)+7)-1 (9*2)+(7-1) (9*2)-(1-7)...

(1+5)*(13-9)=24

2*8-1+9=24; 2*(9-1)+8=24; 8/(1+2)*9=24; 8-(1-9)*2=24;

9开根=3 3x9=27 27-2-1=24

6*(9-5)*1 (5-1)*(9-3) (3+5)*(9-6) (9÷3+1)*6

1. 4×[2+﹙5-1﹚] 2. [﹙5+2﹚-1]×4 3. 4×[2-﹙1-5﹚]

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