Tuesday, 25 February 2014

Algebra Q3 Solving Equation

Group 2



Support Programme

The following shall turn up for the Support Programme this week.
We will be revisiting Chapters 1 & 2.
Support Programme
Date: 27 February (Thursday)
Time: 2 pm to 2.50 pm
Venue: S1-04 Classroom
5LIM XIN YI SAMMI
7NGO EE YING
9SAFFRON SOPHIA LEE
10TAN YOU YI
11ADAM AIMAN B IZHAM
12AFIQ PRASANTO
13CHAN SHAN JIN, AERON
15JOSEPH FOO CHEE YANG
17MIN KHANT HTEIN
18MUHAMMAD ALFAATIH BIN MOHAMED
21PAN JIANG YU, ETHAN
24TALGERI RAVIRAJ RAMCHANDRA
25ZAVIER TEO MENG JUN

Saturday, 22 February 2014

Topic Review 2: Real Numbers - Error Analysis (1)


Topic Review 2: Real Numbers - Error Analysis (2)


Topic Review 2: Real Numbers - Error Analysis (3)





Topic Review 2: Real Numbers - Is there a more efficient way of evaluating this?

In this question,
the student converted all the mixed numbers to improper fractions; followed by finding a common denominator of all the terms (resulting 120).
Is this step necessary?





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"?

Enter your thinking (algorithm) in Comments.

Thursday, 20 February 2014

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

Enter your suggested lengths in comments.

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


Enter your suggested dimensions in Comments

Wednesday, 19 February 2014

Algebra: The Mind Reader

Click at the LINK to get the Crystal ball reading your mind



Could you UNCOVER THE MYSTERY behind the crystal ball?
(in the Algebraic way!)
Submit your explanation under comments...

Monday, 17 February 2014

Group 2


Group 1's Solution


Algebra... Which is larger? (II)


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

Do you agree? Explain your answer. 

Enter your response in Comments.

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.

Enter your response in Comments.

Algebra: Variables & Constants



Click HERE to view the Spreadsheet.

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?
Click HERE to read more about these...


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

Thursday, 13 February 2014

Algebra... Which is larger? (I)



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

Explain your answer clearly with examples.


Enter your response in Comments.
This question is compulsory.

Information Gathering