（ただし１と２を合せて１２のような使い方は出来ません。）
89個の解法が見つかりました。
(((2+9)-1)-0)=10
((0×2)+(1+9))=10
((0+(2+9))-1)=10
((0+2)+(9-1))=10
((0+2)-(1-9))=10
((0+9)+(2-1))=10
((0+9)-(1-2))=10
((0-1)+(2+9))=10
((0÷2)+(1+9))=10
((1+9)+(0×2))=10
((1+9)+(0÷2))=10
((1+9)-(0×2))=10
((1+9)-(0÷2))=10
((2+(0+9))-1)=10
((2+(9-0))-1)=10
((2+(9-1))-0)=10
((2+9)+(0-1))=10
((2+9)-(0+1))=10
((2+9)-(1-0))=10
((2-(0-9))-1)=10
((2-(1-9))-0)=10
((2-0)+(9-1))=10
((2-0)-(1-9))=10
((2-1)+(0+9))=10
((2-1)+(9-0))=10
((2-1)-(0-9))=10
((9+(0+2))-1)=10
((9+(2-0))-1)=10
((9+(2-1))-0)=10
((9-(0-2))-1)=10
((9-(1-2))-0)=10
((9-0)+(2-1))=10
((9-0)-(1-2))=10
((9-1)+(0+2))=10
((9-1)+(2-0))=10
((9-1)-(0-2))=10
(0+((2+9)-1))=10
(0+(2+(9-1)))=10
(0+(2-(1-9)))=10
(0+(9+(2-1)))=10
(0+(9-(1-2)))=10
(0-((1-2)-9))=10
(0-((1-9)-2))=10
(0-(1-(2+9)))=10
(1+(9+(0×2)))=10
(1+(9+(0÷2)))=10
(1+(9-(0×2)))=10
(1+(9-(0÷2)))=10
(1-((0×2)-9))=10
(1-((0÷2)-9))=10
(2+((0+9)-1))=10
(2+((9-0)-1))=10
(2+((9-1)-0))=10
(2+(0+(9-1)))=10
(2+(0-(1-9)))=10
(2+(9+(0-1)))=10
(2+(9-(0+1)))=10
(2+(9-(1-0)))=10
(2-((0+1)-9))=10
(2-((1-0)-9))=10
(2-((1-9)-0))=10
(2-(0+(1-9)))=10
(2-(0-(9-1)))=10
(2-(1+(0-9)))=10
(2-(1-(0+9)))=10
(2-(1-(9-0)))=10
(9+((0+2)-1))=10
(9+((2-0)-1))=10
(9+((2-1)-0))=10
(9+(0+(2-1)))=10
(9+(0-(1-2)))=10
(9+(1+(0×2)))=10
(9+(1+(0÷2)))=10
(9+(1-(0×2)))=10
(9+(1-(0÷2)))=10
(9+(2+(0-1)))=10
(9+(2-(0+1)))=10
(9+(2-(1-0)))=10
(9-((0×2)-1))=10
(9-((0+1)-2))=10
(9-((0÷2)-1))=10
(9-((1-0)-2))=10
(9-((1-2)-0))=10
(9-(0+(1-2)))=10
(9-(0-(2-1)))=10
(9-(1+(0-2)))=10
(9-(1-(0+2)))=10
(9-(1-(2-0)))=10