Question 1: \((v) \quad \sqrt{8} \)
Solution:
- In this problem, the number is under a square root, so start by converting it to a decimal.
- \( \sqrt{8}=2.8 \), rounding to the first digit after the decimal, the number lies between 2 and 3.
- Next, divide the segment between 2 and 3 into 10 equal parts.
- Since the number after decimal is 8, place a dot on the eighth division from 2 toward 3, representing the required number on the number line.