Unit 3. Integer Numbers

 Here you have the Index for the unit 3:

UNIT 3. INTEGER NUMBERS

1. What are Integer Numbers? Negative numbers
2. How to represent Integer numbers. The order of Integer numbers
3. Opposite numbers and Absolute value
4. Multiplying and dividing Integer Numbers
5. Adding and subtracting integer numbers
6. Combined operations with additions and subtractions
7. Powers with Integer numbers
8. Combined operations involving Integer numbers

Find here some notes taken by students of last year (Mónica and Jimena) and Alejandro who is now in Bachillerato. Thank you all.

👉 Paragraphs 1 - 4 (click on the picture to open the notes)

Absolute value and opposite numbers: 👀 watch the video: 

How to multiply and divide Integer numbers and how to apply the rule of signs:

👉 Paragraph 5.- Adding and subtracting Integer Numbers

To add or subtract you have to remove brackets applying the rule of signs and then operate (considering the signs, of course)  here

 

 

Unit 2. Multiples and factors. Divisibility

 Find here, thanks to two students of ESO (Jimena and Mónica) some clear and useful notes about the unit.

There are also some videos about the main lessons.

👉 Click on the picture to download the notes for:

Prime numbers and divisibility Rules:

 👿👻👾  prezi presentation for the test of divisibility 🧛🐺👹

Prime factorization Process:

This video may help you to understand the factorization proccess.

Common Multiples and common factors:

Watch these two videos about Common Factors and the Highest Common Factor:

And Common multiples and the Lowest Common Multiple

General method to find the LCM and the HCF:

Watch this video to learn the general method to calculate LCM and HCF

Two examples, calculate the HCF and LCM of 45, 21 and 84

Question What is the HCF and the LCM when there is not any common factor?

Watch the solution here:

Click to download here the Exercises:  18-22         30-32         41-43       63-68    word problems