8+6= 16-8= 40+7= 36-6=
15-9= 14-7= 18-9= 56-6=
12-4= 11-2=
①14-5+8=
②15-7-6=
③28-8+5=
④7-7+2=
⑤11-6+40=
⑥9+4-6=
7157 4664 6365
16-97 13-912-5
答:够 不够 (在合适的答案后面画“√”)