2. If a cotton swab is 20 cm long and moves 2 cm at a time, how many times does it take to move the cotton swab from one end to the other?
3. If the length of the cotton swab is 30 cm and it moves 3 cm at a time, how many times does it need to move from one end to the other?
4. If a cotton swab is 40 cm long and moves 4 cm at a time, how many times does it need to move from one end to the other?
5. If a cotton swab is 50 cm long and moves 5 cm at a time, how many times does it need to move from one end to the other?
6. If a cotton swab is 60 cm long and moves 6 cm at a time, how many times does it need to move from one end to the other?
7. If the length of a cotton swab is 70 cm, it moves 7 cm at a time. How many times does it take to move the cotton swab from one end to the other?
8. If a cotton swab is 80 cm long and moves 8 cm at a time, how many times does it need to move from one end to the other?
9. If a cotton swab is 90 cm long and moves 9 cm at a time, how many times does it need to move from one end to the other?
10. If the length of the cotton swab is 100 cm, and it moves 10 cm at a time, how many times does it take for the cotton swab to move from one end to the other?
The above questions are all about the mathematics of moving cotton swabs. Through these problems, we can learn how to solve problems through mathematical models.