（ただし１と２を合せて１２のような使い方は出来ません。）
62個の解法が見つかりました。
((1+(6+9))-6)=10
((1+6)+(9-6))=10
((1+6)-(6-9))=10
((1+9)×(6÷6))=10
((1+9)+(6-6))=10
((1+9)-(6-6))=10
((1+9)÷(6÷6))=10
((1-6)+(6+9))=10
((6×(1+9))÷6)=10
((6+(1+9))-6)=10
((6+9)+(1-6))=10
((6+9)-(6-1))=10
((6-6)+(1+9))=10
((6÷6)×(1+9))=10
((6÷6)+(1×9))=10
((6÷6)+(9÷1))=10
((9+(1+6))-6)=10
((9+(6÷6))÷1)=10
((9-6)+(1+6))=10
((9÷1)+(6÷6))=10
(1×(9+(6÷6)))=10
(1+((6×9)÷6))=10
(1+((6+9)-6))=10
(1+(6×(9÷6)))=10
(1+(6+(9-6)))=10
(1+(6-(6-9)))=10
(1+(6÷(6÷9)))=10
(1+(9×(6÷6)))=10
(1+(9+(6-6)))=10
(1+(9-(6-6)))=10
(1+(9÷(6÷6)))=10
(1-((6-6)-9))=10
(1-((6-9)-6))=10
(1-(6-(6+9)))=10
(6×((1+9)÷6))=10
(6×(1+(6÷9)))=10
(6+((1+9)-6))=10
(6+(1+(9-6)))=10
(6+(1-(6-9)))=10
(6+(9+(1-6)))=10
(6+(9-(6-1)))=10
(6-((6-1)-9))=10
(6-((6-9)-1))=10
(6-(6-(1+9)))=10
(6÷(6÷(1+9)))=10
(9+((1×6)÷6))=10
(9+((1+6)-6))=10
(9+((6÷1)÷6))=10
(9+((6÷6)÷1))=10
(9+(1×(6÷6)))=10
(9+(1+(6-6)))=10
(9+(1-(6-6)))=10
(9+(1÷(6÷6)))=10
(9+(6×(1÷6)))=10
(9+(6+(1-6)))=10
(9+(6-(6-1)))=10
(9+(6÷(1×6)))=10
(9+(6÷(6÷1)))=10
(9-((6-1)-6))=10
(9-((6-6)-1))=10
(9-(6-(1+6)))=10