ゼロの向こう側へ！負の数を使った足し算

In this course, students will learn how to add positive and negative numbers together.

On the first day of class, students will review basic addition and subtraction problems. Students will then be introduced to the concept of adding a negative number to a positive number, and it will be demonstrated how to solve this type of problem. Students will also be shown what to do if the negative number is listed first in the problem. Lastly, students will be shown how to solve problems where the negative number is larger than the positive number (thus yielding a negative sum). After all these concepts have been demonstrated, we will work through a few problems together using these concepts. On this day, we will only work with problems involving single-digit addends.
On the second day of class, students will learn about solving addition problems where both addends are negative. We will then work through some more single-digit examples together, incorporating the concepts covered. We will then tackle problems with both double- and single-digit addends together. Next, we will practice with problems involving all double-digit addends. Lastly, we will end with examples of problems with triple-digit addends.
On the third day of class, students will take the lead in solving problems in a sort of informal quiz. They will have four problems to solve on their own, and we will discuss the correct answers together afterward.

Students should have a good understanding of addition and subtraction before taking this class. Students should also be familiar with the concept of negative numbers. If students are lacking in any of these areas, please consider "Subtract It! Using Triple Digit Numbers" or "What are Negative Numbers?" first.