(ただし1と2を合せて12のような使い方は出来ません。)
36個の解法が見つかりました。
((3+6)+(8-7))=10
((3+6)-(7-8))=10
((3+8)+(6-7))=10
((3+8)-(7-6))=10
((3-7)+(6+8))=10
((6+(3+8))-7)=10
((6+8)+(3-7))=10
((6+8)-(7-3))=10
((6-7)+(3+8))=10
((8+(3+6))-7)=10
((8-7)+(3+6))=10
(3+((6+8)-7))=10
(3+(6+(8-7)))=10
(3+(6-(7-8)))=10
(3+(8+(6-7)))=10
(3+(8-(7-6)))=10
(3-((7-6)-8))=10
(3-((7-8)-6))=10
(3-(7-(6+8)))=10
(6+((3+8)-7))=10
(6+(3+(8-7)))=10
(6+(3-(7-8)))=10
(6+(8+(3-7)))=10
(6+(8-(7-3)))=10
(6-((7-3)-8))=10
(6-((7-8)-3))=10
(6-(7-(3+8)))=10
(8+((3+6)-7))=10
(8+(3+(6-7)))=10
(8+(3-(7-6)))=10
(8+(6+(3-7)))=10
(8+(6-(7-3)))=10
(8-((7-3)-6))=10
(8-((7-6)-3))=10
(8-(7-(3+6)))=10