Answer:
7800
Explanation:
7782
The 2 is in the ones place.
The 8 is in the tens place.
The 7 at right is in the hundreds place.
The 7 at left is in the thousands place.
We need to round to the hundreds place, so the digits to the right of the hundreds place become zeros.
That means we write this:
7700
Now we look at the leftmost digit we dropped. It was the 8. Since 8 is from 5 to 9, the digit to its left goes up one. The 7 becomes 8.
We get this:
7800
Answer: 7800