To estimate the sum of 325 + 169 by rounding both numbers to the nearest hundred:
- 325 rounds to 300.
- 169 rounds to 200.
So, the estimated sum is: \[ 300 + 200 = 500. \]
Now, let's find the exact sum of 325 and 169: \[ 325 + 169 = 494. \]
Therefore, the estimated sum is 500 and the exact sum is 494.