Re: O-Level Elementary Math
Posted: Fri May 10, 2019 12:18 pm
You're most welcome, Candy08. Hope you managed to get a slot with him:).
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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!Pand wrote: ↑Thu Mar 28, 2019 5:04 pmSorry, 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 Math Note wrote: ↑Thu Mar 28, 2019 11:05 am0.034 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.
The cambridge solution to a similar question in the o level is same as mine. Unfortunately, only teachers have access to the report.
b): there is a trap here. the correct answer is 1+(6/n) or (n+6)/n
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.
Okay... I know this upper bound thing. BUT, how to convince the student into accepting it?Pand wrote: ↑Thu Mar 28, 2019 5:04 pmSorry, 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 Math Note wrote: ↑Thu Mar 28, 2019 11:05 am0.034 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.
The cambridge solution to a similar question in the o level is same as mine. Unfortunately, only teachers have access to the report.