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Re: O-Level Elementary Math

Posted: Fri May 10, 2019 12:18 pm
by hanhui
You're most welcome, Candy08. Hope you managed to get a slot with him:).

Re: O-Level Elementary Math

Posted: Thu May 30, 2019 8:12 am
by The Math Note
Pand wrote:
Thu Mar 28, 2019 5:04 pm
The Math Note wrote:
Thu Mar 28, 2019 11:05 am
0.034 rounded off to the nearest 0.01 is 0.03
0.025 rounded off to the nearest 0.01 is also 0.03

So anything between 0.025 and 0.034 rounded off to the nearest 0.01 is 0.03.

Hope that helps. 📏😊
Sorry, unfortunately, your answer is wrong. I am a math teacher and am aware of the confusion this question causes to people not familiar with bounds.

The cambridge solution to a similar question in the o level is same as mine. Unfortunately, only teachers have access to the report.
Thank you for your reply. Actually I was just stating the general idea for rounding off a number but not answering the question per se because i am aware that this question might cause confusion. Thank you for the insight! :smile:

Re: O-Level Elementary Math

Posted: Sat Jun 01, 2019 5:16 pm
by Pand
No Problem.. this is one of the question that causes students to falter...
another question in the O level that confuses many is "provide your answer to a reasonable accuracy".... students often fail to understand the mathematical significance of that question beyond practical aspects...

Re: O-Level Elementary Math

Posted: Sat Jun 01, 2019 10:51 pm
by VRossi
Image


Please help to solve this

Re: O-Level Elementary Math

Posted: Sun Jun 02, 2019 11:26 am
by iRabbit
VRossi wrote:
Sat Jun 01, 2019 10:51 pm
Image


Please help to solve this
From my boy. Btw he mentioned that this was more MO than normal Math. Is he correct or does normal Math nowadays encompass elements of MO too?

Image

Re: O-Level Elementary Math

Posted: Mon Jun 24, 2019 12:31 pm
by Dofkehang
iRabbit wrote:
Sun Jun 02, 2019 11:26 am
VRossi wrote:
Sat Jun 01, 2019 10:51 pm
Image


Please help to solve this
From my boy. Btw he mentioned that this was more MO than normal Math. Is he correct or does normal Math nowadays encompass elements of MO too?

Image
b): there is a trap here. the correct answer is 1+(6/n) or (n+6)/n

Re: O-Level Elementary Math

Posted: Mon Jun 24, 2019 12:33 pm
by Dofkehang
VRossi wrote:
Sat Jun 01, 2019 10:51 pm
Image


Please help to solve this
a) 19/16
b) (n+6)/n
c) no, as 200 is not a power of 2

Re: O-Level Elementary Math

Posted: Wed Feb 26, 2020 9:15 am
by Yeohaikal
iRabbit wrote:
Sun Jun 02, 2019 11:26 am
VRossi wrote:
Sat Jun 01, 2019 10:51 pm
Image


Please help to solve this
From my boy. Btw he mentioned that this was more MO than normal Math. Is he correct or does normal Math nowadays encompass elements of MO too?

Image
This comes under the topic of Number Patterns and definitely not at the MO-level. I would say that it is a pretty tough question for lower secondary students, but if it is as part of preparing for O-Levels in Sec 4, may be more reasonable.

Re: O-Level Elementary Math

Posted: Thu Mar 05, 2020 3:50 pm
by jo sarah
please see attached solution
Image

Re: O-Level Elementary Math

Posted: Tue Mar 24, 2020 12:09 am
by MathematicsMagic
Pand wrote:
Thu Mar 28, 2019 5:04 pm
The Math Note wrote:
Thu Mar 28, 2019 11:05 am
0.034 rounded off to the nearest 0.01 is 0.03
0.025 rounded off to the nearest 0.01 is also 0.03

So anything between 0.025 and 0.034 rounded off to the nearest 0.01 is 0.03.

Hope that helps. 📏😊
Sorry, unfortunately, your answer is wrong. I am a math teacher and am aware of the confusion this question causes to people not familiar with bounds.

The cambridge solution to a similar question in the o level is same as mine. Unfortunately, only teachers have access to the report.
Okay... I know this upper bound thing. BUT, how to convince the student into accepting it?

As in, some of the students can be quite stubborn and unwilling(and unamused) to accept this idea. Especially when the answer key in assessment book normally use the "wrong" upper bound(in this example, 0.034).