How to add two large whole numbers by adding in the vertical method, 87549 + 13866

The video tutorial focuses on adding multi-digit numbers using a vertical method. It begins with an introduction to the concept, followed by a detailed explanation of how to add numbers vertically. The instructor provides step-by-step guidance, including carrying over numbers when necessary. The tutorial concludes with finalizing the sum and ensuring the correct placement of commas in the result.

What does the teacher mean by 'writing the one up here' when adding?

Explain the process of adding the numbers 1, 4, 6, and 8 as described in the text.