Friday, February 26, 2010

Chapter 3: Estimation and Approximation

An introductory lesson on Approximation.
Refer to the link and identify the difference/s between approximation and estimation.
after that view the following videos:

Resource: NEWater – the Singapore Story

For Task 1: You would like to watch the video for inspiration.
source: Youtube

Thursday, February 25, 2010

resource: save our earth

For Task 1: You would like to watch the video for inspiration.

Estimation in the Real World

project done by Kristin on Environmental awareness - Save the Sharks!

project done by CHAN TSE TZANG on Environment
project done by Ng Kok Yin on SARS alert!

project done by Eunice on Customer Service

project done by Bing Jue on NEWater

project done by Clarabelle on SARS alert!

This is an introductory exercise on Estimation and Approximation

Objective: to create awareness on the use of estimation and approximation in the real world.

  • Individually complete the following task assign to you
  • Find information relevant to the given issue presented
  • Present your findings in a simple, 1 page presentation (you may use any media/form)

Key to note:
The presentation should show the following:
  • estimated value/s
  • the assumption/s that you have made
  • your brief reflection on the seriousness of the issue presented.

Upload your 1 page presentation:


Environmental Awareness : Minimise usage of paper and save the earth!

Resource: click here


NEWater – the Singapore Story

Resource: click here


Tipping in Restaurant : A culture or customer's rights!

Resource: click here


Abstain from eating Shark fins soup: Save the Sharks !

Resource: click here


The Potential Danger : SARS alert!

Resource: click here

Sunday, February 7, 2010

The Number Family

Number System - the Family Tree

In the Modern Number system we have various types of numbers. Your first task is to identify the definitions given for the various types of numbers. Provide reliable examples to support your definition.

The list below is not exhaustive and you may want to add a few more different types of numbers.

  • Rational Numbers
  • Irrational Numbers
  • Integers
  • Zero
  • Fractions
  • Positive Fractions
  • Whole Numbers
  • Natural Numbers

You may use mindmeister or any on-line mind-mapping tool for the above exercise.


  1. Analyse the family tree from reliable sources such as Mathematical dictionary.
  2. Pen your Real Number Family Tree and submit this to your Maths teacher.
  3. You may use any mindmap tools such as mindmeister, etc
  4. Once graded and approved upload your Real Number Family Tree in your personal blog and link it to your class maths blog
  5. Discussion in groups of 4s-5s however individual submission expected.