5+5= 7-5= 10-6= 9-0+1=
8-4= 9-2= 8+1= 5+3-2=
10-1= 3+7= 3+3= 10-7-3=
6+2= 7-2= 4+6= 1+3+5=
= (只)
□-□-□=□