（ただし１と２を合せて１２のような使い方は出来ません。）
51個の解法が見つかりました。
((1+(3+8))-2)=10
((1+3)+(8-2))=10
((1+3)-(2-8))=10
((1+8)+(3-2))=10
((1+8)-(2-3))=10
((1-2)+(3+8))=10
((2×(8-3))÷1)=10
((2÷1)×(8-3))=10
((3+(1+8))-2)=10
((3+8)+(1-2))=10
((3+8)-(2-1))=10
((3-2)+(1+8))=10
((8+(1+3))-2)=10
((8-2)+(1+3))=10
((8-3)×(1×2))=10
((8-3)×(2÷1))=10
((8-3)÷(1÷2))=10
(1×(2×(8-3)))=10
(1+((3+8)-2))=10
(1+(3+(8-2)))=10
(1+(3-(2-8)))=10
(1+(8+(3-2)))=10
(1+(8-(2-3)))=10
(1-((2-3)-8))=10
(1-((2-8)-3))=10
(1-(2-(3+8)))=10
(2×((1×8)-3))=10
(2×((8-3)÷1))=10
(2×((8÷1)-3))=10
(2×(1×(8-3)))=10
(2×(8-(1×3)))=10
(2×(8-(3÷1)))=10
(2÷(1÷(8-3)))=10
(3+((1+8)-2))=10
(3+(1+(8-2)))=10
(3+(1-(2-8)))=10
(3+(8+(1-2)))=10
(3+(8-(2-1)))=10
(3-((2-1)-8))=10
(3-((2-8)-1))=10
(3-(2-(1+8)))=10
(8+((1+3)-2))=10
(8+((1+3)÷2))=10
(8+(1+(3-2)))=10
(8+(1-(2-3)))=10
(8+(3+(1-2)))=10
(8+(3-(2-1)))=10
(8-((2-1)-3))=10
(8-((2-3)-1))=10
(8-(2-(1+3)))=10