Bar models in addition and subtraction problems - 4th grade math
This is an introductory lesson for using bar models (diagrams) in simple addition and subtraction equations and word problems. First we solve simple equations involving either addition or subtraction with the help of the bar model. Then we solve some word problems. This lesson is meant for 4th grade math. I hope it helps! :)

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1.8 How to Set Up Bar Models (4th Grade)

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Math Antics - Finding A Percent Of A Number
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[Grade 6] Mathematics: Adding and Subtracting Mixed Numbers

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Introduction to The Bar Model (Strip Diagram) - Math Problem Solving Method

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Pan balance with a "double scales" - puzzle problems for 4th grade and up

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The Bar Model Method in Action

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Math Antics - What Are Percentages?

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Introduction to long division | Multiplication and division | Arithmetic | Khan Academy

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The concept of "how many more" - 1st grade math

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Adding Fractions with Unlike Denominators - Add Fraction Maths

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Algebra Basics: Solving Basic Equations Part 1 - Math Antics

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