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I want to learn about: Addition and Subtraction

Content about addition and subtraction in elementary mathematics. Exercises, tutorials, and problems with addition and subtraction in elementary mathematics. Here you will find posts about adding and subtracting to make learning mathematics easier and more fun.

Apr02

Learn to Add Using the Rekenrek

Learn to Add Using the Rekenrek

In today’s post we’re going to learn to add using the Rekenrek abacus to help us. We saw in a previous post that the rekenrek is a flexible learning material because it can be adapted to different calculation strategies. Today we’re going to talk in detail about how to use the rekenrek to help demonstrate some of the […]

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Dec15

Completing Additions, Subtractions, Multiplications and Divisions

Completing Additions, Subtractions, Multiplications and Divisions

In today’s entry, we’re going to talk about some of the exercises that appear during the Smartick daily sessions. They may appear complex and convoluted at times, but they have great didactic potential. They are exercises that require the student to complete a basic operation (addition, subtraction, multiplication, or division). These activities help the student understand different […]

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Jul24

Round and Estimate Subtraction Problems

Round and Estimate Subtraction Problems

In this post, we are going to learn how to round and use estimation in subtraction problems. Mastering this skill is helpful in verifying that an exact answer is of the correct order of magnitude and also in determining whether an answer is reasonable or not. Round and Estimating Subtraction Problems in Tens Round the […]

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Jul07

Review Vertical Subtraction with Examples

Review Vertical Subtraction with Examples

In today’s post, we are going to review vertical subtraction. As always, we are going to review with examples that will help us to understand what vertical subtraction consists of and how to solve such problems. Before we begin, let’s review the material that we’ll use to subtract. We’ll use individual cubes to represent 1s. […]

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Jun28

Mental Math by Association

In this post, we are going to learn a mental math trick for adding and subtracting various numbers. It’s all about grouping the numbers that can give us exactly ten. In order to do so, we really need to pay attention to the numbers. Mental Math: Addition In order to add, we need to see […]

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