（ただし１と２を合せて１２のような使い方は出来ません。）
85個の解法が見つかりました。
(((4×5)÷2)-0)=10
((0×4)+(2×5))=10
((0+(4×5))÷2)=10
((0+4)×(5÷2))=10
((0+4)÷(2÷5))=10
((0+5)×(4-2))=10
((0+5)×(4÷2))=10
((0+5)÷(2÷4))=10
((0-5)×(2-4))=10
((0÷4)+(2×5))=10
((2×5)+(0×4))=10
((2×5)+(0÷4))=10
((2×5)-(0×4))=10
((2×5)-(0÷4))=10
((2-4)×(0-5))=10
((4×(0+5))÷2)=10
((4×(5-0))÷2)=10
((4×(5÷2))-0)=10
((4×5)÷(0+2))=10
((4×5)÷(2-0))=10
((4-0)×(5÷2))=10
((4-0)÷(2÷5))=10
((4-2)×(0+5))=10
((4-2)×(5-0))=10
((4÷(2÷5))-0)=10
((4÷2)×(0+5))=10
((4÷2)×(5-0))=10
((5×(0+4))÷2)=10
((5×(4-0))÷2)=10
((5×(4-2))-0)=10
((5×(4÷2))-0)=10
((5-0)×(4-2))=10
((5-0)×(4÷2))=10
((5-0)÷(2÷4))=10
((5÷(2÷4))-0)=10
((5÷2)×(0+4))=10
((5÷2)×(4-0))=10
(0+((4×5)÷2))=10
(0+(4×(5÷2)))=10
(0+(4÷(2÷5)))=10
(0+(5×(4-2)))=10
(0+(5×(4÷2)))=10
(0+(5÷(2÷4)))=10
(0-(5×(2-4)))=10
(2×(5+(0×4)))=10
(2×(5+(0÷4)))=10
(2×(5-(0×4)))=10
(2×(5-(0÷4)))=10
(4×((0+5)÷2))=10
(4×((5-0)÷2))=10
(4×((5÷2)-0))=10
(4×(0+(5÷2)))=10
(4×(5÷(0+2)))=10
(4×(5÷(2-0)))=10
(4÷((0+2)÷5))=10
(4÷((2-0)÷5))=10
(4÷((2÷5)-0))=10
(4÷(0+(2÷5)))=10
(4÷(2÷(0+5)))=10
(4÷(2÷(5-0)))=10
(5×((0+4)-2))=10
(5×((0+4)÷2))=10
(5×((4-0)-2))=10
(5×((4-0)÷2))=10
(5×((4-2)-0))=10
(5×((4÷2)-0))=10
(5×(0+(4-2)))=10
(5×(0+(4÷2)))=10
(5×(0-(2-4)))=10
(5×(2+(0×4)))=10
(5×(2+(0÷4)))=10
(5×(2-(0×4)))=10
(5×(2-(0÷4)))=10
(5×(4+(0-2)))=10
(5×(4-(0+2)))=10
(5×(4-(2-0)))=10
(5×(4÷(0+2)))=10
(5×(4÷(2-0)))=10
(5÷((0+2)÷4))=10
(5÷((2-0)÷4))=10
(5÷((2÷4)-0))=10
(5÷(0+(2÷4)))=10
(5÷(2÷(0+4)))=10
(5÷(2÷(4-0)))=10