（ただし１と２を合せて１２のような使い方は出来ません。）
55個の解法が見つかりました。
(((4+7)÷1)-1)=10
((1×(4+7))-1)=10
((1×4)+(7-1))=10
((1×4)-(1-7))=10
((1×7)+(4-1))=10
((1×7)-(1-4))=10
((4+(1×7))-1)=10
((4+(7-1))÷1)=10
((4+(7÷1))-1)=10
((4+7)-(1×1))=10
((4+7)-(1÷1))=10
((4-(1-7))÷1)=10
((4-1)+(1×7))=10
((4-1)+(7÷1))=10
((4÷1)+(7-1))=10
((4÷1)-(1-7))=10
((7×(1+1))-4)=10
((7+(1×4))-1)=10
((7+(4-1))÷1)=10
((7+(4÷1))-1)=10
((7-(1-4))÷1)=10
((7-1)+(1×4))=10
((7-1)+(4÷1))=10
((7÷1)+(4-1))=10
((7÷1)-(1-4))=10
(1×((4+7)-1))=10
(1×(4+(7-1)))=10
(1×(4-(1-7)))=10
(1×(7+(4-1)))=10
(1×(7-(1-4)))=10
(4+((1×7)-1))=10
(4+((7-1)÷1))=10
(4+((7÷1)-1))=10
(4+(1×(7-1)))=10
(4+(7-(1×1)))=10
(4+(7-(1÷1)))=10
(4-((1×1)-7))=10
(4-((1-7)÷1))=10
(4-((1÷1)-7))=10
(4-(1×(1-7)))=10
(4-(1-(1×7)))=10
(4-(1-(7÷1)))=10
(7+((1×4)-1))=10
(7+((4-1)÷1))=10
(7+((4÷1)-1))=10
(7+(1×(4-1)))=10
(7+(4-(1×1)))=10
(7+(4-(1÷1)))=10
(7-((1×1)-4))=10
(7-((1-4)÷1))=10
(7-((1÷1)-4))=10
(7-(1×(1-4)))=10
(7-(1-(1×4)))=10
(7-(1-(4÷1)))=10