## Tuesday, 29 March 2016

### Factorisation: 5-minute Quiz (II)

1. Attempt the following questions on writing paper.

2. Write your name, register number and class.

3. Copy the Heading "Factorisation Using Common Factor".

You attempted the Quiz on 29 March 2016.
Below is the suggested worked solution.

## Monday, 28 March 2016

### Getting ready for next lesson: Factorisation using Special Product

In the next lesson, we will learn the 3rd method to factorise algebraic expressions.

• You are given a handout that comes with 8 examples.
• Each example comes with a short clip. Watch how to compare/ express the terms so that we can use one of the special products to factorise the expression.
• Complete this task before the next lesson.

### More Practice: Factorisation Identifying Common Factors

Afternote
Marked - please look through and try to figure out what's wrong with those questions that are not correctly done.

## Saturday, 26 March 2016

### Factorisation by Grouping: A Preview

Dear S1-01

In Term 2 Week 2, we will be learning the 2nd method to factorise an algebraic expression: Factorisation by Grouping.

A reading assignment has been assigned.
You are strongly encouraged to watch the examples to learn the technique before the class discussion.
Upon completion, attempt the Quiz to check your understanding.

Watch the playlist on how to apply the technique:

Study Notes: We had discussed the questions in class.
Below is the set of answers for checking:

### Factorisation by Common Factors

Reference: Study Notes (p 23) Class Work Tier A

Group 3 & Group 6

Group 1 & Group 4

Group 5 & Group 2

Question 17

Question 18

Question 20

## Wednesday, 9 March 2016

### Unit 4: Algebra (2)

Simplifying Expressions

## Tuesday, 8 March 2016

Dear S1-01

Your Maths file (orange arch file) will be collected for checking in Term 1 Week 10.
You were first notified about the file check in an earlier post dated 4 March 2016.

1. A content page has been issued for each topic so that you can organise the materials as shown (see image 1 below).

2. Write your name, register number and class at the spine of the file, and place them on the bench at the window (see image 2 below).

3. Submit your files by Thursday (10 March 2016).

Image 1: Organise your handouts in this manner

Image 2: Organise your files in this manner:

### 8 March: Things we accomplished today and Getting Ready for Next Lesson

Today, we went through selected questions in the Study Notes of Lesson 4.2.
• p11: Examples (d), (e) and (f)
• p12: Class Work 1 Tier A Q7 and Q8 (checked answer).

You need to develop the fluency on the technique used to simplify the given algebraic expressions (and fractions).

Read the posts and watch the video clips posted in the blog today.

Heads-up: We will be discussing p14 to p18 in the next 2 lessons.

### Algebra: Simple Expansion (2) Algebraic Fractions - Let's check!

Applying what you just learnt, check your answers (in the Study Notes) with the following slides.

### Algebraic Expansion: Concrete to Abstract

Dear S1-01

We ended our lesson with an activity that helps us to link what we already know (i.e. Area of rectangle) to expansion in algebra, using the index card given to you.

By finding the area of each part (smaller rectangles) and organising the terms, we learnt how this could be done through expanding (a +1) and (2a + 3) using Distributive Law of Multiplication (that we learnt in Topic 2)

Here's a summary of the activity:

You are given the set of notes that went on to elaborate the application of the expansion of expressions.

You may refer to the following clips to help you understand the process better as you attempt the questions:

(1) Youtube Playlist (click at the link): Study notes - Examples (d)

(2) Youtube Playlist (click at the link): Study notes: Examples (f), (e), Class Work Tier A Q8

Note: Some lessons are assigned to you via AceLearning - in preparation of what we are going to do next week.

## Monday, 7 March 2016

### 7 March: Things we accomplished today and Getting Ready for Next Lesson

Dear S1-01

1. Preparation for tomorrow's lesson
Please go through Study Notes for Lesson 4.3.
It is on expansion using distributive law (which we did in class today)
Go through and attempt the questions for tomorrow's discussion.

You should finish attempting the 3 other examples that explains "expansion by distributive law".
You can check the details in slides at
http://sst2016-s101maths.blogspot.sg/2016/03/making-connections-from-concrete-to.html

2. Challenging Questions (attempted during lesson)
Attempt the 3 questions in your workbook.
This would be a good practice for you to put the knowledge and skills acquired in the topic so far.

The proposed solution from the groups are already inserted in the Google Slides.
http://sst2016-s101maths.blogspot.sg/2016/02/algebra-challenging-question-1.html

Note that we still do not have the correct worked solution for Question 2 yet.
Remember to indicate your name and group in at the slide.

3. Self-Directed Learning
Study notes and Assignment sheet were issued to you.
Do read the details in the blog post:
http://sst2016-s101maths.blogspot.sg/2016/03/sdl-02-ratio-rate-and-speed.html

### Algebra: Challenging Question #1 - Simplifying Expressions

Note: This was posted in the Maths blog on 24 February.

This is a quick preview of what we are going to do next... (25 February 2016)
At the end of the lesson, you would be able to answer to the following "Challenging" questions :)

## Sunday, 6 March 2016

### SDL (02) Ratio, Rate and Speed

We are adopting the Self-Directed Learning (SDL) Approach for the topic, Ratio, Rate and Speed.

Study notes
will be issued to you on 7 March (Monday).
• While most of the materials are familiar (as you did in primary school), there are new knowledge introduced, that would discuss with you in Term 2 Week 2.
Apart from the Study Notes that would be issued to you by Term 1 Week 10, you would refer to the materials in the GoogleSite and AceLearning.

You should have received email notifications on THREE short quizzes (via AceLearning) that are assigned for you to practise.

• While it is not compulsory, having enough practices to recall what you learnt before and be aware of how more complex questions are asked would be very helpful and prepare you for the class discussions subsequently.
Note: Should you encounter technical problems when submitting your quiz answers, do send an email to AceLearning Support for assistance. The email address is support@acelearn.com

Homework will be assigned to you.
Deadline: Term 2 Week 2 (Monday)

Softcopies of materials (study notes, quizzes and homework) are available in the GoogleSite > Mathematics > S1-01.

## Friday, 4 March 2016

### Getting Ready for Next Lesson

Dear S1-01

Before we meet for Monday's lesson, please do the following:
• Review of Assignment 4.2 and Getting Ready for 4.4
• Please go through Study Notes for Lesson 4.2 and Lesson 4.3, in preparation of next Monday's lesson
• AceLearning Quiz
• An online lesson has been assigned (Simple Algebraic Manipulation). Please read/ watch the lesson materials at the portal
• Attempt the 15-Question (20 mark) Quiz
• Assignment 4.2
• It was returned (for those who submitted). We'll discuss the commonly made errors surfaced on Monday (7 March)
• Maths File
• By now, you should have filed all the handouts (including Study Notes) in your Maths file. Do get it ready for start submitting the files from Monday. Deadline would be next Wednesday.

## Thursday, 3 March 2016

### Revision: For Discussion - Word Problems

Answer the following questions on writing paper(s).

Include your name (index number), class
Subject: Maths - Revision: Word Problems (HCF, LCM, Percentages)

Total Duration: 20 minutes [Total = 12 marks]
• Do not copy question.
• Show all working clearly.
• Label the working with Question number and parts clearly.
• Leave a line between questions and parts.

Question 1

Ms Claire used 90 red flowers, 105 yellow flowers and 120 white flowers to make bouquets. Each bouquet had the same number of red, yellow and white flowers. In other words, all the bouquets are identical. All the flowers are used. Find
(a) The greatest number of bouquets that could be made. [3]
(b) How many red, yellow and white flowers did each bouquet come with? [2]

Question 2

The warning system for a lighthouse flashes a beam of light every 25 seconds while the warning message is activated every 1.5 minute. Find the time taken in minutes for both to be played at the same time. [3]

Hint: Convert the time to seconds

Question 3

A fruit seller buys 480 kg of durian at \$2.50 per kg. He sells 20% of it at \$6 per kg and 75% of the remainder at \$4 per kg. If the rest of the durians are not sold, find the gain or loss as a percentage of the cost price. [4]

You are expected to write statements/ descriptions to inform the reader what the working represents.
E.g. Cost price of 480 kg of durian =
E.g. Profit/ Loss =
E.g. Percentage Gain/ Loss as a percentage of cost price =

Like a number of you, Alex scored full marks; Alex lost 1 presentation mark [P] and 1 unit mark [U], as a result, his final score is 10/12.

## Wednesday, 2 March 2016

### Revision: For Discussion - Percentages

During the 20-min session on how to answer questions in word problems like "Percentages", the following were highlighted:
• "Percentage Point" refers to the difference of 2 percentages.
• Many of you are now able to write the step-to-step working. However, when answering problem questions, it requires you to write down brief description of what you are working on (e.g. "Cost Price", "Original Price", "Price after 25% discount", "Percentage Increase"). Otherwise, your numerical-only working does not carry meaning with it.
• Remember to indicate "%" when you are supposed to find an answer in "%". Writing a numerical value shows that you are not clear what is required in the question.
• Remember to write down the "units"

Answers to the working are all available in Maths GoogleSite > S1-01 page (scroll down to the relevant folder)

2 questions were highlighted and templates were given to guide you on step by step presentation.
One technique to handle such question is presenting the info in a diagram.

Source: S1 Mathematics Workbook 1 (Homework issued)

### Revision: For Discussion Y2012 Level Test 1

Complete the following question in 10 minutes on writing paper.