急急急!7,9,2,1,算24点!3种

Question

如题所述

Answer 1

9×2-1+7=24，2×7＋9＋1=24，（9-1)×√(7+2)=24

Answer 2

　　7*2+1+9，7+2*9-1，7-(1-2*9)

Answer 3

2X7+9+1
2X9+7-1

Answer 4

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