一、Listen and write. 在英语节目上,同学们正在介绍自己的年龄。根据所听内容,在括号里写出正确的数字。

听力材料暂缺，听力答案无法提供。

由于没有提供具体的听力内容，无法直接写出答案。但根据题目要求和四年级上册Unit 5 "Numbers around us"的知识点，解题步骤应为：
1. 仔细听每个同学（Lu Hao, Zhao Lu, Wang Qin, Li Fang, Lu Yong）介绍年龄的录音。
2. 捕捉关键数字信息（如 "I'm nine." 对应数字 "9"）。
3. 将听到的数字按人物顺序（1-5）填写在括号中。

二、Think and write. Yanyan正在做数学题。请你帮助Yanyan,根据最后的结果,写一写数字单词,补全公式。

1. - =
2. + =
3. - =
4. + =

【解析】：
1. For the first equation, "something minus something equals 13". We can use "sixteen minus three equals thirteen". So the blanks are sixteen, three, thirteen.
2. For the second equation, "something plus something equals 15". We can use "seven plus eight equals fifteen". So the blanks are seven, eight, fifteen.
3. For the third equation, "something minus something equals 12". We can use "nineteen minus seven equals twelve". So the blanks are nineteen, seven, twelve.
4. For the fourth equation, "something plus something equals 16". We can use "ten plus six equals sixteen". So the blanks are ten, six, sixteen.
【答案】：
1. sixteen, three, thirteen
2. seven, eight, fifteen
3. nineteen, seven, twelve
4. ten, six, sixteen