Finding Total Length Using Bar Models

MatholiaChannel

This educational video teaches students how to solve word problems involving length by using bar models and column addition. Through two clear examples—a toy train and a pair of bridges—the video demonstrates the step-by-step process of extracting information from text, visualizing it with a bar model, and calculating the total using vertical addition. It specifically addresses measurement units like centimeters (cm) and meters (m). The video focuses on key mathematical themes including addition, measurement, and problem-solving strategies. It introduces the bar model method (a staple of Singapore Math) as a tool to visualize part-part-whole relationships. The content progresses from simple addition within 20 to two-digit addition with regrouping, supporting scaffolding of difficulty. For educators, this video serves as an excellent instructional tool for 2nd and 3rd-grade math lessons. It helps bridge the gap between abstract word problems and concrete calculation by providing a consistent visual framework. Teachers can use it to introduce the concept of "total length" or to reinforce the strategy of drawing models before calculating answers.