[S1] LESSON 42 : Maths Headstart L1 – Expansion Updates/Debrief

[S1 Maths + Science PMCians]

What we did in 2 hours:

Good to see all of you back after the 2 weeks break!

After a quick 10min recap on Sec 1 algebraic expansion, we went on to look at what Sec 2 expansion has for us! Instead of a single term entering the “house” (ie, formally known as brackets), we have 2 “houses” side by side. Using our trusty rainbow method, we can expand all sorts of expressions with patience and practising due diligence to ensure all terms are accounted for at the last line. 


Moving into the 2nd hour, we introduced students with 3 shortcuts

(i) (a+b)^2 = a^2 + 2ab +b^2

(ii) (a-b)^2 = a^2 – 2ab +b^2 

(iii) (a+b)(a-b) = a^2 – b^2 


These shortcuts enable us to tackle expansion questions with much more speed. As mentioned in class, the speed will come after much practice. So, have you tried the Take Away Questions on page 19 to 23 ? – please do so before you attend this coming lesson. 


Special Mention:

This coming week, we’ll be moving on to solving quadratic equations and interesting word problems.


Should you need assistance in your daily practices, do send your attempted workings and questions to 9005 1733. We will strive to clarify your doubts. 
See you in class!  😀



Your friendly tutors,

The S1MA+SCI Team


Students can choose to attend any of the timeslots onsite in the respective outlets or live from home at the same timing. There will be both ONSITE and ONLINE audience for all classes. ONSITE and ONLINE students will be able to interact with one another and the tutor will be able to engage both audiences. Both platforms (onsite and online) will be carried out concurrently, ensuring that students in the physical classroom and those attending lessons via Zoom are taught exactly the same content, at the same time, by the same tutor.