(ただし1と2を合せて12のような使い方は出来ません。)
35個の解法が見つかりました。
((3+(3+7))-3)=10
((3+3)+(7-3))=10
((3+3)-(3-7))=10
((3+7)×(3÷3))=10
((3+7)+(3-3))=10
((3+7)-(3-3))=10
((3+7)÷(3÷3))=10
((3-3)+(3+7))=10
((3÷3)×(3+7))=10
((7+(3+3))-3)=10
((7-3)+(3+3))=10
(3×((3+7)÷3))=10
(3+((3×7)÷3))=10
(3+((3+7)-3))=10
(3+(3×(7÷3)))=10
(3+(3+(7-3)))=10
(3+(3-(3-7)))=10
(3+(3÷(3÷7)))=10
(3+(7×(3÷3)))=10
(3+(7+(3-3)))=10
(3+(7-(3-3)))=10
(3+(7÷(3÷3)))=10
(3-((3-3)-7))=10
(3-((3-7)-3))=10
(3-(3-(3+7)))=10
(3÷(3÷(3+7)))=10
(7+((3×3)÷3))=10
(7+((3+3)-3))=10
(7+(3×(3÷3)))=10
(7+(3+(3-3)))=10
(7+(3-(3-3)))=10
(7+(3÷(3÷3)))=10
(7-((3-3)-3))=10
(7-(3-(3+3)))=10