(ただし1と2を合せて12のような使い方は出来ません。)
36個の解法が見つかりました。
((4+(4+6))-4)=10
((4+4)+(6-4))=10
((4+4)-(4-6))=10
((4+6)×(4÷4))=10
((4+6)+(4-4))=10
((4+6)-(4-4))=10
((4+6)÷(4÷4))=10
((4-4)+(4+6))=10
((4÷4)×(4+6))=10
((6+(4+4))-4)=10
((6-4)+(4+4))=10
(4×((4+6)÷4))=10
(4×(4-(6÷4)))=10
(4+((4×6)÷4))=10
(4+((4+6)-4))=10
(4+(4×(6÷4)))=10
(4+(4+(6-4)))=10
(4+(4-(4-6)))=10
(4+(4÷(4÷6)))=10
(4+(6×(4÷4)))=10
(4+(6+(4-4)))=10
(4+(6-(4-4)))=10
(4+(6÷(4÷4)))=10
(4-((4-4)-6))=10
(4-((4-6)-4))=10
(4-(4-(4+6)))=10
(4÷(4÷(4+6)))=10
(6+((4×4)÷4))=10
(6+((4+4)-4))=10
(6+(4×(4÷4)))=10
(6+(4+(4-4)))=10
(6+(4-(4-4)))=10
(6+(4÷(4÷4)))=10
(6-((4-4)-4))=10
(6-(4-(4+4)))=10