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Zusammenfassung Bruchrechnung

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Diesen Dokument ist eine Zusammenfassung zum Thema Bruchrechnung inklusive Übungsbeispiele

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Merkzettel: Brüche und Dezimalzahlen


1. Was ist ein Bruch?
Ein Bruch besteht aus:

 Zähler (oben): Anzahl der Teile

 Nenner (unten): Wie viele gleich große Teile ein Ganzes hat

Beispiel:
bedeutet: 3 von 4 gleich großen Teilen




2. Brüche kürzen & erweitern
Kürzen: Zähler und Nenner durch die gleiche Zahl teilen.

=

Erweitern: Zähler und Nenner mit der gleichen Zahl multiplizieren.

=




3. Brüche addieren & subtrahieren
a) Gleicher Nenner:

+ =



b) Ungleicher Nenner:

 Auf gemeinsamen Nenner bringen (kleinstes gemeinsames Vielfaches)

 Zähler entsprechend anpassen

Beispiel:
1 1 3 2 5
+ = + =
4 6 12 12 12

Document information

Study
Middle School
School year
2
Uploaded on
April 24, 2025
Number of pages
3
Written in
2024/2025
Type
Summary
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