What does the partial sum method require when solving addition problems?

The partial sum method is a strategy for performing addition by breaking down each number into its place values, allowing for a clear and organized way to calculate the total sum. This approach involves isolating each component of the numbers being added—such as tens, hundreds, and units—and summing these components separately. By adding the totals of each place value together at the end, it simplifies the addition process and helps to minimize errors that can occur when adding larger numbers directly.

This method is particularly effective for teaching students to understand the concept of place value, as it emphasizes the importance of each digit's position within a number. This helps solidify foundational math skills and prepares students for more complex mathematical operations in the future. The clarity provided by the partial sum method enables students to visualize the addition process more effectively, fostering a deeper understanding of mathematics.