（4）在下面的钉子板上画一个四边形和一个六边形。（4分）

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

五、解决问题

1、有多少只小鸡？（3分）

　　　　　□○□＝□（ ）

2、 （6分）

小猪 小兔 平均每分钟跳成功的个数 4个 6个 　　

①小兔3分钟跳成功了多少个？ ②小猪4分钟跳成功了多少个？

□○□=□（ ） □○□=□（ ）

2.（3分）

气球共有？个