2+3= 4-1= 0+2= 2+5= 5-1=
9-4= 8-6= 6+2= 4+5= 7+1=
3-3= 7+0= 9-7= 4+4= 9-8=
5+3= 6-5= 1+6= 8-7= 7-3=
(棵)
76 910 8-22 37-3
5+410 10-26 6+47+6
139+4 912-2 4+44+8
7-59 6+514 3+4-19-3
算式: