Adding Two-Digit Numbers Without Regrouping Using Base Ten Blocks

MatholiaChannel

This educational video provides a clear, step-by-step visual demonstration of adding two-digit numbers without regrouping using the concrete-pictorial-abstract (CPA) approach. It specifically focuses on the problem 52 + 37, utilizing digital base ten blocks placed within a place value chart alongside the standard vertical written method. The dual representation helps students bridge the gap between physical quantities and abstract numerical symbols. The key themes explored include place value understanding (distinguishing between tens and ones), the order of operations in vertical addition (starting with the ones column), and the connection between visual models and written algorithms. The video emphasizes the procedural rule of "ones first, then tens" which is foundational for mastering addition with regrouping in later stages. For educators, this video serves as an excellent instructional model for 1st and 2nd-grade classrooms. It is particularly useful for visual learners who struggle with the abstract concept of vertical addition. Teachers can use this video to introduce the topic, reinforce the importance of column alignment, or as a remediation tool for students who need to visualize the "why" behind the math procedures.