4
25 910 33
76+2 4+14-1 1+34
个
2+3= 4+2= 0+8= 7-3=
6+1= 5-4= 6-3= 5+2=
3+4= 6-5= 4+3= 8-5=
9-2= 4+5= 3+3= 7+2=