bar models

Common Mistakes in Bar Models

Bar Modeling is a very powerful heuristic in Singapore math. Representing unknown quantities and the relationships between them using rectangular “bars” gives an intuitive and visual representation of the problem. More importantly, when used correctly, representing problem using bar models makes students approach the solution in a systematic and algebraic manner. This empowers even young …

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Using Bar Models for Multiplication and Division

Using Bar Models for Multiplication and Division

Do you know we can use bar models for multiplication and division problems? In this blog post, we illustrate some of the common types of word problems involving Multiplication and Division and how to solve them using this powerful heuristic. Using Bar Models for Multiplication and Division in One-Step Multiplication Word Problems Example (from Math in …

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Singapore math worked solutions

Worked Solution – Math In Focus Workbook 3A Chapter 9 Page 168 – Two-Step Multiplication Word Problem

This is a question from Math In Focus Workbook 3A Lesson 9.2 (Real-World Problems: Two-step Problems with Multiplication): Jill has 28 stickers. Peggy has 4 times as many stickers as Jill. Luis has 15 fewer stickers than Peggy. How many stickers does Luis have? Solution: Peggy has P = 4 x 28 = 112 Luis …

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