2012 PSLE Discussions and Strategy

[atutor2001]

jtoh:

Are there P5 prelim papers? Thought it was just the usual SA1 and SA2 papers at P5?

Should be SA2 paper. Sorry lah, wrong term used because I am not from MOE like you.

[atutor2001]

verykiasu2010:

may be that one not Singapore school system ?

Ya loh. My system can be used to estimate mean and sd from psle results but yours can't.

[verykiasu2010]

atutor2001:

verykiasu2010:

may be that one not Singapore school system ?

Ya loh. My system can be used to estimate mean and sd from psle results but yours can't.

you mean P5 got prelim paper ha? singapore system P5 no have prelim mah ....which school has ?

[chl72]

James Ang:

A good and rigorous practice for P5/P6 level students is imperative to prepare them well for PSLE later on, eg in the new Casco 5A book, page 340, Q. 59 shows a commonly tested question type on ratio topic. I estimate that at most, fewer than 1 in 3 PSLE students can solve this type of Maths question even though they have learnt it in school, from books or elsewhere.



Sandra had some red and pink beads in the ratio 3:2. After she bought another 9 red beads and 36 pink beads, the ratio became 6:7. How many beads did Sandra have altogether at first?

Hi James,
Is the answer 85?

[James Ang]

chl72:

James Ang:

A good and rigorous practice for P5/P6 level students is imperative to prepare them well for PSLE later on, eg in the new Casco 5A book, page 340, Q. 59 shows a commonly tested question type on ratio topic. I estimate that at most, fewer than 1 in 3 PSLE students can solve this type of Maths question even though they have learnt it in school, from books or elsewhere.



Sandra had some red and pink beads in the ratio 3:2. After she bought another 9 red beads and 36 pink beads, the ratio became 6:7. How many beads did Sandra have altogether at first?

Hi James,
Is the answer 85?

Yes, clever!

[chl72]

James Ang:

chl72:

[quote=\"James Ang\"]A good and rigorous practice for P5/P6 level students is imperative to prepare them well for PSLE later on, eg in the new Casco 5A book, page 340, Q. 59 shows a commonly tested question type on ratio topic. I estimate that at most, fewer than 1 in 3 PSLE students can solve this type of Maths question even though they have learnt it in school, from books or elsewhere.



Sandra had some red and pink beads in the ratio 3:2. After she bought another 9 red beads and 36 pink beads, the ratio became 6:7. How many beads did Sandra have altogether at first?

Hi James,
Is the answer 85?

Yes, clever! :)[/quote]Hee... 过奖了！ :lol:
Can share some more questions that a PSLE 'taker' should/MUST know?

[Tinkerbelle]

chl72:

James Ang:

[quote=\"chl72\"]
Hi James,
Is the answer 85?

Yes, clever!

Hee... 过奖了！ :lol:
Can share some more questions that a PSLE 'taker' should/MUST know?[/quote]Hi chl72,
Wow...care to share how you derived your answer?? Thanks.

[Brenda10]

Hi, give a try



R : P
3 : 2
+9 +36
6 : 7

R 21u 63
P 12u 216
Diff 9u 153
1u 17

5u x 17 = 85

[chl72]

Tinkerbelle:

chl72:

[quote=\"James Ang\"]
Yes, clever!

Hee... 过奖了！ :lol:
Can share some more questions that a PSLE 'taker' should/MUST know?

Hi chl72,
Wow...care to share how you derived your answer?? Thanks.[/quote]Actually, mine is a stupid and long winded method. Old already, can only think about simultaneous equations. :lol:

R : P
3 : 2
+9 : +36
---------------
6 : 7

-> 3U+9=6P -> 1/2U+3/2=1P

2U+36=7P
2U+36=7(1/2U+3/2)
7/2U-2U=36-21/2
1U=17
17*5=85

[Tinkerbelle]

Brenda10:

Hi, give a try



R : P
3 : 2
+9 +36
6 : 7

R 21u 63
P 12u 216
Diff 9u 153
1u 17

5u x 17 = 85

Thanks Brenda. Planning to ask DD to try later. Hope she can solve it.