To solve this problem, you first identify the smallest addend and its highest place value. Then, you round both numbers to that same place value before adding them together.Step-by-Step Solution * Identify the addends: The two addends are 28,296 and 73,634. * Find the smallest addend: The smallest addend is 28,296. * Identify the highest place value of the smallest addend: The highest place value in 28,296 is the ten thousands place (the digit 2). * Round both addends to the ten thousands place: * 28,296 rounds up to 30,000 because the thousands digit (8) is 5 or greater. * 73,634 rounds down to 70,000 because the thousands digit (3) is less than 5. * Add the rounded numbers: * 30,000 + 70,000 = 100,000The final answer is 100,000.