To estimate the expression \( 567.3 - 431.5 \) by rounding to the nearest hundred:
- Round \( 567.3 \) to the nearest hundred, which is \( 600 \).
- Round \( 431.5 \) to the nearest hundred, which is \( 400 \).
Now, rewrite the problem with the estimates:
\[ 600 - 400 \]
Now, calculate the estimated answer:
\[ 600 - 400 = 200 \]
So the estimated answer is \( 200 \).