Understanding Bar Models for Word Problems
Bar models (also called tape diagrams or strip diagrams) are a powerful visual tool from Singapore Math that helps students understand and solve word problems.
What Is a Bar Model?
A bar model represents quantities as rectangular bars. It provides a visual bridge between the concrete (objects) and abstract (equations).
Types of Bar Models
Part-Whole Model
Used for addition and subtraction problems:
Comparison Model
Used for comparing quantities:
Multiplication/Division Model
Used for equal groups:
Example Problem
"Sam has 24 stickers. He gives away 7 stickers. How many does he have left?"
Bar Model Solution: