Theory:

Here comes the procedure to estimate the numbers to the nearest thousands by rounding off.
Step 1:  Find the digits in the thousands place.
 
Step 2: Determine the digit to its right.
 
Step 3: If this digit is \(5\) or greater, add \(1\) to it. If it is lesser, then leave it as it is.
 
Step 4: Make the digits to the right of thousands place to zeros.
Consider the number \(73280\).
 
Let us follow the steps to find the estimated number.
 
Step
Applying it
73280 to thousands
1Find the digits to the thousands place7\(3\)280
2Determine the digit to its right.7\(3\)280
3If this digit is \(5\) or greater add \(1\) to it.  If it is lesser, then leave it as it is.
7\(3\)280
(2<5). Leave it as it is.
4Make the digits to the right of hundreds place \(5\) to zeros.73000
 
Thus, estimating the number \(73280\) to the nearest hundreds is \(73000\).
 
Now try to round the number 54534 to the nearest hundreds and tens place.
 
Estimation of 54534 to the nearest hundreds is 54500.
 
Estimation of 54534 to the nearest tens is 54530.