6+6=
7+8=
9+6=
13-5=
12-7=
4+9=
13-8=
15-6=
8+9=
14-8=
16-9=
17-9=
15-7=
14-7=
7+5=
18-9=
够 不够(画“√”)
13-5= 14-9= 16-9= 17-9=
17-8= 13-8= 6+7= 14-7=
14-8= 12-6= 15-6= 4+8=
27-9= 38+6= 64+8= 66+7=
38+40= 62-50= 7+53= 62-6=
3+89= 67+5= 9+35= 8+45=
42-4= 25+17= 60-3= 80-5=
38-7= 72+9= 5+46= 30-8=
67+9=
70-5=
25+70=
53-18=
40+58=
80-70=
23+4=
83-80=