This resource focuses on teaching students the standard addition algorithm for solving multi-digit addition problems, specifically in contexts relevant to grocery shopping. It includes various activities where students will calculate the total costs of items such as bread, milk, eggs, and cheese, emphasizing correct alignment of digits and regrouping techniques when necessary. Students are encouraged to show their work to solidify their understanding. The final challenge requires students to identify and correct a mistake made by a peer in addition calculations, fostering critical thinking and peer review skills.