Adding 28 Units to 53: Place Value Calculation Problem

To solve this problem, we will add the numbers by employing the method of columnar addition:

• Step 1: Add the units (rightmost digits) of both numbers:
  Given units: $3$ (from 53) and $8$ (from 28).
• Calculate: $3 + 8 = 11$. Since this is more than 10, we write down $1$ in the units place and carry over $1$ to the tens place.
• Step 2: Add the tens (leftmost digits) of both numbers:
  Given tens: $5$ (from 53) and $2$ (from 28).
• Including the carry-over: $5 + 2 + 1 = 8$.
• Place $8$ in the tens place.

Therefore, the resulting number after adding 53 and 28 is $81$.