This learning resource focuses on practicing addition of 3-digit numbers using the standard algorithm with a specific emphasis on regrouping. In the context of a community food drive, students will add the amounts of canned food collected during two shifts: 458 cans from the morning and 374 cans from the afternoon. The exercise encourages students to align their place values correctly, ensuring accurate calculations, and includes a worked example for guidance. Additionally, it prompts students to reflect on the necessity of regrouping when the sum of the ones column exceeds nine, reinforcing their understanding of the addition process.