Winnie Win
Asked 8 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Someone pls help! Tq

Replies 7
Xavier Sng

5 years ago
Caleb Tey

Working backwards - A has 400 at the end. Since it double, it had 200 at the start. This means that B gave A 200. On returning A->B, B will have 400+200=600 But this is after B doubled. Hence B will have 300 at the start. Finally = 1200-200-300 = 700 C has 700 at the start

5 years ago
Winnie Win

Thank you Xavier Sng & Caleb Tey very much! 😄

5 years ago
Caleb Tey

Xavier Sng provided the diagram. I provided the story.

5 years ago
Xavier Sng

Suzzie Toh, the pleasure is ours. Caleb Tey, good job.

5 years ago
Izam Marwasi

The diagram is clear and the story is easy to understand.. Combinations of both will make the kids understand better including myself.. LOL.. Kudos to Xavier Sng and Caleb Tey..

5 years ago
Xavier Sng

Thank you so much for your kind words, Izam Marwasi. The truth be told some of my best teachers were, in all seriousness students that I had taught many years ago. Their young minds were uncluttered by conventional wisdom and established mechanisms. They played a big part in helping me understand that problem-solving is essentially best driven by attitude, and not by high-sounding methodology.

5 years ago

Kalviraj Seethalakshmi
Asked 8 years ago

SG chevron_right Primary 4 chevron_right Measurement

Need help pls thanks

Replies 6
Soo Vei Li

The working so far is on the right track with just 1 more step to go: from the 1st and 3rd equation, we can conclude that 3 Breadths = 360m. The rest of the solution, I think shouldn't be a problem.

5 years ago
Caleb Tey

5 years ago
Kalviraj Seethalakshmi

Pls can u solve for me the problem Vei Li Soo

5 years ago
Soo Vei Li

Here you go, Kalviraj Seethalakshmi...

5 years ago
Kalviraj Seethalakshmi

Thank you

5 years ago
Xavier Sng

5 years ago

Tan Weiqiang
Asked 8 years ago

SG chevron_right Primary 5 chevron_right Fractions

Many apologies for going MIA for a couple of days. I got a little busy over the weekend after the sharing session on Friday. I must first of all thank all the parents and students who turned up on Friday. I sincerely hope you benefitted from the session. Meanwhile, I will share this question which a parent sent me. Honestly, this question may be a little over-set.However, it is possible to have this question in Paper 1 for the purpose of separating the As from the A*.Do watch the video till the end for an important announcement. :) Hope this helps!

Replies 1
Foong Ling

Thanks for sharing. It was one of qns found in the PSLE booklet, year 2014.

5 years ago

Adrian Ng
Asked 8 years ago

SG chevron_right Primary 5 chevron_right Measurement

Making it visual...

Replies 1
Arlene Tan

Thank you Adrian!

5 years ago

Mavis Low
Asked 8 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Can I ask how you can solve this question using the model method? Because I can only solve it using algebra/simultaneous equations (which is a Sec 2 topic, btw) and even the solution provided uses algebra/simul eqns. It's from the 2014 Catholic High SA2 paper. Does anyone know if these kinds of questions might come out in the PSLE?

Replies 4
Caleb Tey

5 years ago
Raymond Ng

90+125=215

5 years ago
Raymond Ng

Mavis low, actually, if your child is comfortable with algebra, solving the 2 linear equations is also a viable option: 8y - 3x = 730 --- (1) y - x = 35 --- (2) The best part is can use calculator to verify answer, so there's no way not to get it right 😄

5 years ago
Soo Vei Li

We may not need the models to solve this but it does give a pictorial of what's happening with the $730.

5 years ago

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