Exploring Addition and Subtraction of Rational Numbers

• Mathematics
• Secondary Education
• Age 13

Exploring Addition and Subtraction of Rational Numbers

Learning Objective

At the end of the lesson, you will be able to add and subtract rational numbers with confidence.

What do you already know about rational numbers?

What are Rational Numbers?

Rational numbers are numbers that can be expressed as a fraction, where the numerator and denominator are integers.

Addition of Rational Numbers

To add rational numbers, add the numerators and keep the same denominator.

Subtraction of Rational Numbers

To subtract rational numbers, subtract the numerators and keep the same denominator.

Interactive Activity: Adding Rational Numbers

Solve the following addition problems: 1) 3/4 + 1/4 2) 2/3 + 5/6

Interactive Activity: Subtracting Rational Numbers

Solve the following subtraction problems: 1) 7/8 - 3/8 2) 5/6 - 2/3

Real-Life Applications

Rational numbers are used in various real-life situations, such as dividing a pizza equally among friends or calculating discounts on shopping items.

Summary

In this lesson, we learned how to add and subtract rational numbers. Remember to add the numerators and keep the same denominator for addition, and subtract the numerators and keep the same denominator for subtraction.

Write down 3 things you learned in this lesson.

Have students enter three things they learned in this lesson. With this they can indicate their own learning efficiency of this lesson.

Write down 2 things you want to know more about.

Here, students enter two things they would like to know more about. This not only increases involvement, but also gives them more ownership.

Ask 1 question about something you haven't quite understood yet.

The students indicate here (in question form) with which part of the material they still have difficulty. For the teacher, this not only provides insight into the extent to which the students understand/master the material, but also a good starting point for the next lesson.

1/2+1/2