(ただし1と2を合せて12のような使い方は出来ません。)
53個の解法が見つかりました。
((4+5)+(6-5))=10
((4+5)-(5-6))=10
((4+6)×(5÷5))=10
((4+6)+(5-5))=10
((4+6)-(5-5))=10
((4+6)÷(5÷5))=10
((4-5)+(5+6))=10
((5×(4+6))÷5)=10
((5×6)-(4×5))=10
((5+(4+6))-5)=10
((5+6)+(4-5))=10
((5+6)-(5-4))=10
((5-5)+(4+6))=10
((5÷5)×(4+6))=10
((6+(4+5))-5)=10
((6-5)+(4+5))=10
(4+((5×6)÷5))=10
(4+((5+6)-5))=10
(4+(5×(6÷5)))=10
(4+(5+(6-5)))=10
(4+(5-(5-6)))=10
(4+(5÷(5÷6)))=10
(4+(6×(5÷5)))=10
(4+(6+(5-5)))=10
(4+(6-(5-5)))=10
(4+(6÷(5÷5)))=10
(4-((5-5)-6))=10
(4-((5-6)-5))=10
(4-(5-(5+6)))=10
(5×((4+6)÷5))=10
(5+((4+6)-5))=10
(5+(4+(6-5)))=10
(5+(4-(5-6)))=10
(5+(6+(4-5)))=10
(5+(6-(5-4)))=10
(5-((5-4)-6))=10
(5-((5-6)-4))=10
(5-(5-(4+6)))=10
(5÷(5÷(4+6)))=10
(6+((4×5)÷5))=10
(6+((4+5)-5))=10
(6+(4×(5÷5)))=10
(6+(4+(5-5)))=10
(6+(4-(5-5)))=10
(6+(4÷(5÷5)))=10
(6+(5×(4÷5)))=10
(6+(5+(4-5)))=10
(6+(5-(5-4)))=10
(6+(5÷(5÷4)))=10
(6-((5-4)-5))=10
(6-((5-5)-4))=10
(6-(5-(4+5)))=10