9+1+5= 9+1+8= 9+1+6= 8+2+1=
9+6= 9+9= 9+7= 8+3=
9+413 8+514 7+811
8+818 3+913 4+912
5+=14 9+=12 9+=13
7+=15 8+=17 2+=11
2+9= 7+5= 10+8= 6+9=
5+8= 4+8= 16–6= 9–5=
7+8 = 3+7= 9+4= 14+5=
6+8 = 5+9= 9+9= 18–6=
18–7+4= 17+2–6= 18–3–2=
19–5–5= 16–2-1= 3+5+9=
一共有几只小兔?
男孩和女孩总人数:
两盒球的个数: