(ただし1と2を合せて12のような使い方は出来ません。)
29個の解法が見つかりました。
((2+3)×(7-5))=10
((2-7)×(3-5))=10
((2-7)+(3×5))=10
((3×(7-2))-5)=10
((3×5)+(2-7))=10
((3×5)-(7-2))=10
((3-5)×(2-7))=10
((5×(7-3))÷2)=10
((5-3)×(7-2))=10
((5÷2)×(7-3))=10
((7-2)×(5-3))=10
((7-3)×(5÷2))=10
((7-3)÷(2÷5))=10
((7-5)×(2+3))=10
(2×((3+7)-5))=10
(2×(3+(7-5)))=10
(2×(3-(5-7)))=10
(2×(7+(3-5)))=10
(2×(7-(5-3)))=10
(2+((3×5)-7))=10
(2-(7-(3×5)))=10
(5×((7-2)-3))=10
(5×((7-3)-2))=10
(5×((7-3)÷2))=10
(5×(7-(2+3)))=10
(5+((3+7)÷2))=10
(5÷((7÷2)-3))=10
(5÷(2÷(7-3)))=10