看看谁算得准。9-4= 9+1= 9-6=8+1= 7+2= 8-7=
10-3= 10-2= 5-2= 7-3= 6-4= 8-4=
5-5= 6-1= 7-3=8-5= 4-2= 9-7=
算一算。3+3= 5+2= 3+6= 0+7= 4+6= 3+4=4+5= 8+2= 5+5=
算一算。2+3= 5+4= 1+4= 6+2= 4+0= 5+2=3+7= 4+2= 5+4=