(ただし1と2を合せて12のような使い方は出来ません。)
24個の解法が見つかりました。
(((8+8)-4)-2)=10
((4+(8+8))÷2)=10
((8+(4+8))÷2)=10
((8+(8-2))-4)=10
((8+(8-4))-2)=10
((8+8)-(2+4))=10
((8-(2-8))-4)=10
((8-(4-8))-2)=10
((8-2)+(8-4))=10
((8-2)-(4-8))=10
((8-4)+(8-2))=10
((8-4)-(2-8))=10
(2×(4+(8÷8)))=10
(8+((8-2)-4))=10
(8+((8-4)-2))=10
(8+((8-4)÷2))=10
(8+(8-(2+4)))=10
(8-((2+4)-8))=10
(8-((4-8)÷2))=10
(8-(2+(4-8)))=10
(8-(2-(8-4)))=10
(8-(4+(2-8)))=10
(8-(4-(8-2)))=10