## Saturday, 22 February 2014

### Class Work: Algebra (1) Substitution

We had discussed Q1 and Q4, and concluded that both were correct.

### Class Work: Algebra (2) Solving Simple Equation

For Q2 and Q4: We did not get the time to discuss Q2 and Q3 during the lesson.

Group 3: 4 points awarded

How we can approach this question (as a typical 'substitution' question)

Group 2: No point awarded

How it should look like:

### 6 AM Quiz: Let's Test FIDO out!

In this round of 6 am quiz, you will attempt to uncover the mystery behind Fido's Mind-Reading ability.

Fido claims that he can read our mind.
Click at the following link to test him out!!! :
http://www.digicc.com/fido/

There are several ways to explain Fido's trick, using mathematical reasoning.
Make an attempt to use ALGEBRA to explain the "trick"?

## Friday, 21 February 2014

### 21 Feb 2014: Submission of Alternative Assessment (up to 1350h)

 Timestamp Name Register number Class 2/19/2014 21:51:43 Bhojwani Ria Manoj 1 S1-01 2/21/2014 12:47:31 Everi Yeo Yi Yun 3 S1-01 2/20/2014 0:46:12 Ho Matsuoka Evangelista Miyuki Sophia 4 S1-01 2/19/2014 22:10:40 Nishtha Gupta 5 S1-01 2/19/2014 23:30:56 Tang Jun Mei, Shanice 6 S1-01 2/16/2014 17:54:01 Chiu Chen Ning 8 S1-01 2/20/2014 20:57:40 Haw Jin Yu 9 S1-01 2/20/2014 20:37:23 Joshua Wee Yu Shuen 11 S1-01 2/19/2014 22:11:37 Kaung Htet Wai Yan 12 S1-01 2/21/2014 6:00:28 Keith Tang Yi Heng 13 S1-01 2/17/2014 21:31:41 Kuan Yew Chong 14 S1-01 2/20/2014 20:20:21 Noel Lim 16 S1-01 2/20/2014 20:12:29 Siddhartha jaruhar 17 S1-01 2/18/2014 23:48:54 Xavien Teo MIng Rui 19 S1-01 2/16/2014 23:20:37 Tham Kai Heng 20 S1-01 2/20/2014 20:07:19 Wagle Prateek Shantanu 21 S1-01 2/16/2014 13:49:01 WONG MIN QUAN 22 S1-01

## Thursday, 20 February 2014

### (Homework) Generalising: From Numbers to Algebra

To be completed by Sunday (23 Feb 2014)

Attempt the following:

### Algebra... Which is larger? (I)

Which is larger in magnitude?
5 + n or  5n

This question is compulsory.

### Algebra... Which is larger? (II)

Jennifer says, "5x2  is always smaller than  (-5x)2. "

This question is compulsory.

### Algebra... Help! What's Wrong?

Jane did the following:
• 3a + b = 3ab
• 2s + 4t = 6st
Do you think Jane is correct in her algebraic manipulations?
If yes, please write down examples to show that her answer is correct.

If not, explain to Jane her mistakes and help her to correct.

### Algebra... Different "Faces" of Algebra (I)

The total length of 4 roads is (3x - 1) km.
What are the possible lengths of the 4 roads in kilometres?

e.g. The length of the 4 roads are: x km, x km, x-7 km, 6 km
Check: x + x + (x - 7) + 6 = 3x - 1

### Algebra... Different "Faces" of Algebra (II)

The perimeter of a rectangle is (6x + 5y) cm.
Suggest 2 possible dimensions of the rectangle.

e.g.
Length of rectangle = 2x + 2y cm
Breadth of rectangle = x + 0.5y cm
Check:
Perimeter = 2 (2x + 2y) + 2 (x + 0.5y) cm
= 4x + 4y + 2x + y cm
= 6x + 5y cm

## Wednesday, 19 February 2014

### Support Programme (24 February)

 Support Programme Date: 24 Feb (Monday) Time: 2.30 pm to 3.30 pm Venue: S1-01 Classroom 2 BISWAKARMA JAISHREE 3 EVERI YEO YI YUN 9 HAW JIN YU 8 CHIU CHEN NING 11 JOSHUA WEE YU SHUEN 13 KEITH TANG YI HENG 14 KUAN YEW CHONG 16 NOEL LIM 17 SIDDHARTHA JARUHAR 18 TAY YONG KIAT, ROY 20 THAM KAI HENG 21 WAGLE PRATEEK SHANTANU 22 WONG MIN QUAN 23 YAP CLEMENT
Things to bring: Maths Workbook; Summative Assessment 1

## Tuesday, 18 February 2014

### Algebra: Equation vs Expression

(I) Algebraic Expressions vs Equations
The following are expressions
• 3x
• 5 - 2y
• p + 2q - 45
• mn
The following are equations:
• 2x = 4
• x + 8 = 20
• x² = 36
• 2x + y = 4
Can you tell the difference between an expression and an equation?

(II) Coefficients, Variables and Constants
In the following algebraic expressions:

(a) 6x
• x is a variable
• 6 is the coefficient of x
• There is no constant
(b) 2y + 5
• y is a variable
• 2 is the coefficient of y
• 5 is the constant
(c) 3m + 7n + 9
• m and n are variables
• 3 and 7 are coefficients of m and n respectively
• 9 is the constant
(d) p + 2q - 45
• p and q are variables
• 1 and 2 are coefficients of p and q respectively
• -45 is the constant
(e) 5a - 3b + 1
• a and b are variables
• 5 and -3 are coefficients of a and b respectively
• 1 is the constant
(f) x - y
• x and y are variables
• 1 and -1 are coefficients of x and y respectively
• There is no constant
When given an expression, are you able to pick out the variable(s), coefficient(s) and constant terms?

Let's learn more terms that are related to Algebra through the Hangman activity (select "Algebra")

## Monday, 17 February 2014

### Tasks assigned on 17 February

Dear S1-01

1. Homework (to be done in foolscap papers)
Remember to copy questions and write neatly:
• Chapter 3: Approximation and Estimation
• Workbook p26
• Q26
• Q27(a), (c), (e), (g), (i)
• Q28
• Q29

2. Preparation for next lesson
Study Notes
• Approximation & Estimation (p50); visit p43 (Let's Discuss)
3. Diagnostic Test on Algebra

4. Summative Assessment for Chap 1 & 2 on 18 Feb (Tuesday)

• After school - 30 minutes

5. 2012 Level Test Maths papers - for Practice
Suggested solution will be available in the GoogleSite from Saturday onwards

Could you UNCOVER THE MYSTERY behind the crystal ball?
(in the Algebraic way!)

## Thursday, 13 February 2014

### Estimation: Pre-Lesson Preparation

On your own, go through the learning activity at
http://www.s-cool.co.uk/gcse/maths/approximations

• Rounding
• Estimating
After this, look out for the Pre-Lesson Reading on Estimation at the AceLearning portal

## Monday, 10 February 2014

### What's the difference between "Estimate" and "Approximate"

Compose 2 sentences to illustrate what you think "Estimate" and "Approximate" mean?
The sentence should bring out the 'context' to demonstrate your understanding of the terms.

Inputs from the 4 groups...

Estimate...

• Group 1: A rough calculation or guess
• Group 2: Estimate the cost of 5 packets of rice if a packet of rice is \$10.25
• Group 3:
• Group 4:

Approximate...

• Group 1: nearly exact, not perfectly accurate
• Group 2: The cost of 5 plates of rice is approximately \$51
• Group 3:
• Group 4:

## Friday, 7 February 2014

### Real Numbers: 4 Operations with Fractions - Addition & Subtraction (Challenger Question 2)

Working 1:

Look at the working presented below.
2 useful strategies were used.
Do you know what are they?

Working 2:

Look at the working presented below.
What's "wrong" with the working presented?

Points scored:
Group 1: 4 (Everi) + 4 (Min Quan) +  4 (Joshua Wee) + 4 (Sophia) = 16 points
Group 2: 3 (Wei San) + 1 (Kai Heng) = 4 points
Group 3: 4 (Keith) = 4 points
Group 4: No submission

### Real Numbers: 4 Operations with Fractions - Addition & Subtraction

What strategy should we adopt when evaluating the following (without the use of calculator)?

## Saturday, 1 February 2014

Is there a 6 a.m. quiz today???