1. **State the problem:** We need to find the range of the number of fire hydrants recorded on each street. 2. **Recall the definition of range:** The range of a set of numbers is the difference between the maximum and minimum values in the set. 3. **Identify the numbers:** The numbers of hydrants are 6, 9, 10, 2, 3, 2, 1, and 3. 4. **Find the maximum and minimum values:** - Maximum number of hydrants: $\max(6,9,10,2,3,2,1,3) = 10$ - Minimum number of hydrants: $\min(6,9,10,2,3,2,1,3) = 1$ 5. **Calculate the range:** $$\text{Range} = \text{Maximum} - \text{Minimum} = 10 - 1 = 9$$ 6. **Answer:** The range of the numbers of fire hydrants on the streets is 9.