This video explains how write related addition and subtraction problems.

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# Relating Addition and Subtraction of Whole Numbers

# Determine a Subtraction Problem Modeled on a Number Line

# Subtract Whole Numbers using Number Lines

# Subtract Whole Numbers using Models (Basic)

# Write a Linear Equation in One Variable App: Depreciation

# Show the Gradient to a Surface Using 3D Calc Plotter

# Show Tangent Lines to a Surface Using 3D Calc Plotter – Directional Derivative

This video explains how write related addition and subtraction problems.

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This video explains how to write an subtraction equation from a number line model.

This video explains how to subtract whole numbers using a number line.

The video explains how to subtract whole numbers by combining 2 sets of objected

This video explains how to write an equation to solving an application problem.

This video using 3D Calc Plotter to illustrate the meaning of a gradient vector.

This video using 3D Calc Plotter to illustrate the meaning of a directional derivative.