Addition and Subtraction of Rational Numbers

This page provides a comprehensive overview of the rules for adding and subtracting rational numbers, focusing on positive and negative integers. The content is particularly useful for students studying rationale Zahlen in Klasse 7 (rational numbers in grade 7).

Definition: Rational numbers are numbers that can be expressed as a fraction of two integers, where the denominator is not zero. They include positive and negative whole numbers, fractions, and decimals.

The page presents four fundamental operations with rational numbers:

1. Adding two positive numbers
2. Subtracting a negative number from a positive number
3. Adding a negative number to a positive number
4. Subtracting a positive number from a positive number

Each operation is accompanied by a clear example to illustrate the concept:

Example: (+5) + (+3) = 5 + 3 = 8 This demonstrates that adding two positive numbers results in a sum that is also positive.

Example: (+5) - (-3) = 5 + 3 = 8 This shows that subtracting a negative number is equivalent to adding its positive counterpart.

Example: (+5) + (-3) = 5 - 3 = 2 This illustrates that adding a negative number is the same as subtracting its absolute value.

Example: (+5) - (+3) = 5 - 3 = 2 This demonstrates that subtracting a positive number from another positive number is straightforward subtraction.

Highlight: The use of parentheses around the numbers helps to clearly distinguish between the operation signs and the signs of the numbers themselves, which is crucial for understanding these calculations.

These examples serve as excellent practice for Übungen Rationale Zahlen addieren und subtrahieren Klasse 7 (exercises for adding and subtracting rational numbers in grade 7). They provide a solid foundation for more complex operations with rational numbers, including multiplication and division, which are often covered in subsequent lessons.

Vocabulary: In the context of rational numbers, "addieren" means to add, and "subtrahieren" means to subtract. These terms are essential for understanding instructions in Rationale Zahlen Regeln pdf documents and worksheets.

The visual layout of the examples on the page makes it easy for students to follow the logic of each operation, making this an effective resource for both classroom instruction and self-study. For students looking for additional practice, searching for Rationale Zahlen addieren und subtrahieren Übungen PDF can provide more exercises to reinforce these concepts.