（ただし１と２を合せて１２のような使い方は出来ません。）
63個の解法が見つかりました。
((1×(1+9))÷1)=10
((1×1)×(1+9))=10
((1×1)+(1×9))=10
((1×1)+(9÷1))=10
((1×9)+(1×1))=10
((1×9)+(1÷1))=10
((1+(1×9))÷1)=10
((1+(1+9))-1)=10
((1+(9÷1))÷1)=10
((1+1)+(9-1))=10
((1+1)-(1-9))=10
((1+9)×(1×1))=10
((1+9)×(1÷1))=10
((1+9)+(1-1))=10
((1+9)-(1-1))=10
((1+9)÷(1×1))=10
((1+9)÷(1÷1))=10
((1-1)+(1+9))=10
((1÷1)×(1+9))=10
((1÷1)+(1×9))=10
((1÷1)+(9÷1))=10
((9+(1×1))÷1)=10
((9+(1+1))-1)=10
((9+(1÷1))÷1)=10
((9-1)+(1+1))=10
((9÷1)+(1×1))=10
((9÷1)+(1÷1))=10
(1×((1+9)÷1))=10
(1×(1×(1+9)))=10
(1×(1+(1×9)))=10
(1×(1+(9÷1)))=10
(1×(9+(1×1)))=10
(1×(9+(1÷1)))=10
(1+((1×9)÷1))=10
(1+((1+9)-1))=10
(1+((9÷1)÷1))=10
(1+(1×(1×9)))=10
(1+(1×(9÷1)))=10
(1+(1+(9-1)))=10
(1+(1-(1-9)))=10
(1+(1÷(1÷9)))=10
(1+(9×(1×1)))=10
(1+(9×(1÷1)))=10
(1+(9+(1-1)))=10
(1+(9-(1-1)))=10
(1+(9÷(1×1)))=10
(1+(9÷(1÷1)))=10
(1-((1-1)-9))=10
(1-((1-9)-1))=10
(1-(1-(1+9)))=10
(1÷(1÷(1+9)))=10
(9+((1×1)÷1))=10
(9+((1+1)-1))=10
(9+((1÷1)÷1))=10
(9+(1×(1×1)))=10
(9+(1×(1÷1)))=10
(9+(1+(1-1)))=10
(9+(1-(1-1)))=10
(9+(1÷(1×1)))=10
(9+(1÷(1÷1)))=10
(9-((1-1)-1))=10
(9-(1-(1+1)))=10