（ただし１と２を合せて１２のような使い方は出来ません。）
44個の解法が見つかりました。
((1+5)+(6-2))=10
((1+5)-(2-6))=10
((1+6)+(5-2))=10
((1+6)-(2-5))=10
((1-2)+(5+6))=10
((5×6)÷(1+2))=10
((5+(1+6))-2)=10
((5+6)+(1-2))=10
((5+6)-(2-1))=10
((5-2)+(1+6))=10
((6+(1+5))-2)=10
((6-2)+(1+5))=10
(1+((5+6)-2))=10
(1+(5+(6-2)))=10
(1+(5-(2-6)))=10
(1+(6+(5-2)))=10
(1+(6-(2-5)))=10
(1-((2-5)-6))=10
(1-((2-6)-5))=10
(1-(2-(5+6)))=10
(2÷((6÷5)-1))=10
(5×((6÷2)-1))=10
(5×(6÷(1+2)))=10
(5+((1+6)-2))=10
(5+(1+(6-2)))=10
(5+(1-(2-6)))=10
(5+(6+(1-2)))=10
(5+(6-(2-1)))=10
(5-((2-1)-6))=10
(5-((2-6)-1))=10
(5-(2-(1+6)))=10
(5÷((1+2)÷6))=10
(6×(5÷(1+2)))=10
(6+((1+5)-2))=10
(6+(1+(5-2)))=10
(6+(1-(2-5)))=10
(6+(5+(1-2)))=10
(6+(5-(2-1)))=10
(6-((2-1)-5))=10
(6-((2-5)-1))=10
(6-(2-(1+5)))=10
(6÷((1+2)÷5))=10
(6÷(1-(2÷5)))=10