(ただし1と2を合せて12のような使い方は出来ません。)
16個の解法が見つかりました。
((2÷2)+(0+9))=10
((2÷2)+(9-0))=10
((2÷2)-(0-9))=10
((9+(2÷2))-0)=10
((9-0)+(2÷2))=10
(0+(9+(2÷2)))=10
(9+((0+2)÷2))=10
(9+((2-0)÷2))=10
(9+((2÷2)-0))=10
(9+(0+(2÷2)))=10
(9+(2÷(0+2)))=10
(9+(2÷(2-0)))=10
(9-((0-2)÷2))=10
(9-(0-(2÷2)))=10
(9-(2÷(0-2)))=10