From the above newspaper cutting,

**Identify one information where exact figure is used, and why you think the exact figure is used.**

Submit your responses under COMMENTS.

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## Self-Directed Learning (I)

## when we meet... in Term 3

## Term 3 Week 3 Maths Test

## Topics

## Announcement: Self-Directed Learning Modules

## Useful Links

## Maths - General Links

## Resources and Video Clips about NUMBERS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Safety In Numbers** Mathematician Marcus du Sautoy reveals how the language of maths is used to construct the complex codes that we encounter in everyday life. Learn about the amazing use of PRIME NUMBERS in our everyday life.

(http://www.teachers.tv/video/3501)

**Zero to Infinity **In this programme, mathematician Marcus du Sautoy explains how humans have developed numbers for their mathematical needs. Hear about the Invention of **Zero** and have a better understanding of **Infinity**. Can we divide a number by Zero? Is *Infinity* the biggest number? (http://www.teachers.tv/video/3500)

*Source: The Guardian (Guardian.co.uk), 4 March 2005 *

Article:**The Magic Number** by Simon Singh

Found!!! The biggest**Prime Number** yet...

Click HERE to read article.

## Resources and Video Clips about FRACTIONS

*Source: Teacher.TV (**http://www.teachers.tv/**)*

**Cutting a Cake** Have you wondered how to divide a cake into 12 pieces using only 4 cuts?

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

**Putting Reciprocals into Practical Use** Reciprocals help us to order "difficult" fractions! (http://www.teachers.tv/video/43452)

## Resources and Video Clips about GEOMETRY

## Video Clips about Data Handling

## Co-Authors

Year 2010

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ODD week

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

Tuesday 0800-0900

Thursday 0900-1000

Friday 0900-1000

EVEN week

Tuesday 1430-1530

Thursday 0800-0900

Friday 1030-1130

The following topics will be covered in the Maths Test

Chapter 4: Introduction to Algebra

Chapter 5: Algebraic Manipulation

Chapter 9: Ratio, Rate and Speed

Chapter 16: Data Handling (including Mean, Median, Mode)

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This term, we have earmarked 2 sub-topics for you to learn on your own... own time own target (to be completed by Term 1 Week 9).

**Chapter 9.2: Average Speed **

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

**Chapter 9.3: Speed**

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

**As these 2 sub-topics are not going to be covered in the class, please check/clarify with Ms Loh (Face-to-face or virtually) when you are in-doubt.**

You are expected to complete sub-topic by 15 May 2010. A Pop-Quiz has been scheduled on 18 May 2010 (Tuesday).

Apart from textbook and workbook, recommended resources and learning activities will be delivered through the AceLearning Portal and the Maths Blog.

(http://www.teachers.tv/video/3501)

Article:

Found!!! The biggest

Click HERE to read article.

(http://www.teachers.tv/video/43462)

Source: Teacher.TV (http://www.teachers.tv/)

Source: Teacher.TV (http://www.teachers.tv/)

**Seaside Triangles** - How properties of triangles become useful in real world applications.

(http://www.teachers.tv/video/37910)

**Surface Area of an Octagon** - Step-by-step process of working out the area of an octagon

(http://www.teachers.tv/video/43382)

(http://www.teachers.tv/video/37910)

(http://www.teachers.tv/video/43382)

This video clip, Statistics: Decisions Through Data shows how data (in the study of Statistics) has enabled mankind to make big and small decisions, that either impact the individuals or the bigger community.

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

*Source: The Futures Channel (**http://www.thefutureschannel.com/index.php**)*. Note: It may take a while to stream the video clip

*This video about...* There are more than 350 different commodities grown in California. In a state that provides approximately 15 percent of U.S. agricultural products, statistics are an important tool for agricultural economists to keep up with supply and demand. Let's hear how the statistics help farmers to make decisions!

Look out for the following segments:

- Describing Data

- Producing Data

- Conclusions from Data

~~~~~~~~~~~~~~~~~~~~~~~~~~

Watch this video clip The Business of Farming

"16 days from opening to closing ceremony". The "16" is an exact figure as figures only as estimate when it is of a very large value, like one million.

ReplyDeleteNumber is 28

ReplyDeleteThis is probably a exact number as number of games will be shown correctly, it is not such a big number that u need to estimate and the number is not the nearest 10

302 gold medals

ReplyDeleteIt is an exact figure as not all of the participants will get a gold medal.

205 countries participating

ReplyDelete"16 Days from opening to closing ceremony" You use an exact figure when you know exactly what the number is.

ReplyDeleteThis comment has been removed by the author.

ReplyDeleteThere are 205 countries competing in the game. I think the exact figure is used so that it will not create misunderstandings between people and to allow people to know the actual number of countries competing, as it is a fact.

ReplyDeleteThe information about the number of sports. As the number is not huge, hence it is an exact figure.

ReplyDelete'28 sports' is an exact figure as the figure is easily countable, so there is no need to round up the number.

ReplyDeletechengngee

205 nations participating in the Olympic Games. The number of nations participating is a whole number and it is countable.

ReplyDelete28 sports. I chose it because people will now how many sports there all together so they can choose which one to watch

ReplyDeleteThis comment has been removed by the author.

ReplyDelete28 sports

ReplyDeleteThere will definitely be these amount of sport because representitives for each sport from each country already registered. The number will not change because preperation has already taken place and is confirmed.

"16 days from opening to closing ceremony". They knew what the exact figure was and the people also needed to know the exact figure.

ReplyDelete28 sports as people would want to know the exact number of sports they are having.

ReplyDeleteI think all the figures except the "16 days from opening to closing ceremony" do not use exact figure. That is mainly because most of them are regarding the numbers of people, tickets and so on and so forth. Since it is very troublesome to find out the actual figure, the newspaper cutting just do a rough estimation for those numbers. As it is obvious that it is 16 days from the opening to closing ceremony, thus I think that it is that phrase.

ReplyDelete"16 Days from opening to closing ceremony"

ReplyDeleteI think it is an exact number so that people will know how long the ceremony will last, unlike the 120 billion yuan which is not exact as they probably round the sum off.

JJ(:

28 sports. It is probably accurate as the number is not that big and can be easily counted without estimating.

ReplyDelete28 Sports

ReplyDeleteI think it uses exact figure as it is small enough to find out the exact figure and there is not much need for estimation.

28 sports as people would want to know how many sports will be taking place

ReplyDelete16 days.

ReplyDeleteIt should be 16 as it should be accurate in showing the number of days to inform people of how long the games will be held, and the number is quite unusual (not rounded off to nearest 10)