加法练习题（第一套）
1. 2 + 1 =
2. 3 + 2 =
3. 1 + 3 =
4. 4 + 2 =
5. 5 + 1 =
6. 2 + 4 =
7. 3 + 1 =
8. 4 + 1 =
9. 1 + 2 =
减法练习题（第一套）
1. 5 – 2 =
2. 4 – 3 =
3. 3 – 2 =
4. 5 – 1 =
5. 4 – 1 =
6. 3 – 1 =
7. 2 – 1 =
8. 5 – 4 =
9. 4 – 2 =
加法练习题（第二套）
1. 2 + 3 =
2. 1 + 4 =
3. 4 + 3 =
4. 5 + 2 =
5. 2 + 5 =
6. 3 + 4 =
7. 1 + 5 =
8. 6 + 1 =
9. 7 + 0 =
减法练习题（第二套）
1. 6 – 3 =
2. 7 – 2 =
3. 5 – 4 =
4. 6 – 5 =
5. 7 – 3 =
6. 4 – 2 =
7. 3 – 2 =
8. 5 – 1 =
9. 1 – 1 =
加法练习题（第三套）
1. 4 + 4 =
2. 3 + 5 =
3. 6 + 2 =
4. 7 + 1 =
5. 2 + 6 =
6. 5 + 3 =
7. 0 + 8 =
8. 8 + 0 =
9. 9 + 0 =
减法练习题（第三套）
1. 8 – 4 =
2. 9 – 1 =
3. 7 – 5 =
4. 8 – 6 =
5. 9 – 7 =
6. 8 – 2 =
7. 9 – 3 =
8. 7 – 1 =
9. 5 – 0 =
以上只是部分练习题，完整的9套练习题会按照相似的模式，从简单的加法和减法开始，逐渐增加到更复杂的计算。这些题目适合儿童或初学者练习，帮助他们逐步掌握9以内的加减法。