Question 1: \((iv) \quad -\sqrt{8} \)
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.