(ただし1と2を合せて12のような使い方は出来ません。)
32個の解法が見つかりました。
((0+4)+(2+4))=10
((2+(4+4))-0)=10
((2+4)+(0+4))=10
((2+4)+(4-0))=10
((2+4)-(0-4))=10
((2-0)+(4+4))=10
((4+(2+4))-0)=10
((4+4)+(0+2))=10
((4+4)+(2-0))=10
((4+4)-(0-2))=10
((4-0)+(2+4))=10
(0+(2+(4+4)))=10
(0+(4+(2+4)))=10
(2+((4+4)-0))=10
(2+(0+(4+4)))=10
(2+(4+(0+4)))=10
(2+(4+(4-0)))=10
(2+(4-(0-4)))=10
(2-((0-4)-4))=10
(2-(0-(4+4)))=10
(4+((2+4)-0))=10
(4+(0+(2+4)))=10
(4+(2+(0+4)))=10
(4+(2+(4-0)))=10
(4+(2-(0-4)))=10
(4+(4+(0+2)))=10
(4+(4+(2-0)))=10
(4+(4-(0-2)))=10
(4-((0-2)-4))=10
(4-((0-4)-2))=10
(4-(0-(2+4)))=10