# Math CHAPTER 2.7 and CHAPTER 2.8 Form 1 By Kelvin

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## Presentation Description

Math CHAPTER 2.7 and CHAPTER 2.8 Form 1 By Kelvin

## Presentation Transcript

### Mathematics – Form 1:

Mathematics – Form 1 Chapter 2.7 and 2.8 By Kelvin

### Common multiples:

Common multiples As same as multiples (on chapter 2.6) Examples: Multiples of 5: 5, 10 , 15, 20 , 25, 30 ,…. Multiples of 10: 10 , 20 , 30 , 40, 50, 60,…. How to answer: The first three common multiples of 5 and 10 are 10, 20, 30.

### Exercise (no solution):

Exercise (no solution) Find the first three common multiples of 3 and 6 4 and 12 7 and 14 9 and 18 2, 3 and 6 (two common multiples) 2, 5 and10 (two common multiples) 3, 6 and 9 (two common multiples)

### Lowest Common Multiples (LCM):

Lowest C ommon Multiples (LCM) As same as common multiples (on chapter 2.7) Examples of 3 and 6 Multiples of 3: 3, 6 , 9, 12 , 15, 18 ,…. Multiples of 6: 6 , 12 , 18 , 24, 30, 36,…. How to answer: The common multiples of 3 and 6 are 6, 12, 18 (non – answer/only know) The LCM of 3 and 6 is 6 ( full answer) – the smallest c ommon multiples

### List the common multiples:

List the common multiples 6 9 3 2 3 2 2 1 Examples :

### Exercise (no solution):

Exercise (no solution) Find the LCM the number below (listing the common multiples) 3 and 4 9 and 11 12 and 18 5 and 15 15, 50 and 100

### Introduction:

Introduction Common factors and highest common factors (HCF) As same as factors More on these chapter (2.9 and 2.10) Coming soon at 14/3/2016 And this unit chapter finish at 14/3/2016

### Slide 8:

THANKS FOR SEE THIS CHAPTER…. THIS THE LAST OF THE CHAPTER 2.7 and 2.8…. NEXT CHAPTER IS COMING SOON AT 14 /3/2016 …..