Q&A - PSLE Math

[Brenda10]

Hi Chrisu


DD is also using MyPals workbook. Not sure whether has she attempt to this question or else ask her to give a try.

[niza6666.028774hotmail.028774com]

Oh yes, his in P6 and is using MyPals workbook.

[Sun_2010]

Hi Chrisu,


The only possible ans is
Adam: 225
Rahmad : 145

[chrisu]

I taught my daughter that method using Alegbra and arrived at 225 too. But the teacher gave another answer. After one whole night, I understand why teacher gave the other answer. The question is very ambiguous. Let's see for more solutions. Thanks.

Sun_2010:

Hi Chrisu,

The only possible ans is
Adam: 225
Rahmad : 145

[LiteracyICare]

Hi hi,


I'm looking for psle foundation maths papers for a P6 boy to practice on... anyone knows of some online/offline resources?... free if possible? I can't seem to find any resources online... only have top school papers.

Do let me know if you know of any; I'll be so grateful!!

Thank you!

[tianzhu]

Hi


These links may offer some help.

http://www.mendaki.org.sg/content_files/PSLE_FoundationMathsFINAL.pdf
http://www.mendaki.org.sg/content_files/2010%20PSLE%20Foundation%20Maths.pdf

You may also want to consider looking at this book.
PSLE Foundation Maths Examination Questions 2006-2010

Also, you may also spend some time in Popular to browse through the relevant books.

Best wishes

[LiteracyICare]

Thank you much! Appreciate your effort. I’ve checked the links… what I was looking for was practice papers. Yes, I guess the best would still be to go to popular and look for the book.


Thank you once again though!

[mrswongtuition]

chrisu:

This question is from the school Maths Workbook and only 4 students got the answer right. The rest mainly got the other answer. Here is the question;


Q11) Adam and Rahmad shared some beads. If Adam gave 1/3 of his share to Rahmad, Rahmad would have 70 more than Adam. If Adam gave 1/5 of his share to Rahmad, Rahmad would have 10 more than Adam. How many beads does Adam have at first?

Thank you.

If Adam gave 1/3 of his share to Rahmad...

A [----][----]
R [----][----][ 70 ]

Which means that Adam will have 2 units left while Rahmad will have 2 units plus 70 more.
Adam would have a total of 3 units at first.

If Adam gave 1/5 of his share to Rahmad....

A [--][--][--][--]
R [--][--][--][--][ 10]

Which means that Adam will have 4 units (different from the first model) left while Rahmad will have 4 units plus 10 more.
Adam would have a total of 5 units at first.

BASED ON SAME TOTAL for Adam (3 x 5 = total 15 units),
We can change the units into....

If Adam gave 1/3 of his share to Rahmad...
All units multiply by 5 to get a total of 15 units at first:

A [-][-][-][-][-][-][-][-][-][-]
R [-][-][-][-][-][-][-][-][-][-][ 70 ]

If Adam gave 1/5 of his share to Rahmad....
All units multiply by 3 to get a total of 15 units at first:

A [-][-][-][-][-][-][-][-][-][-][-][-]
R [-][-][-][-][-][-][-][-][-][-][-][-][ 10]

Comparing the above 2 models, we can see that 4 units = 70 - 10 = 60

1 unit = 60/4 = 15
15 units = 15 x 15 = 225

***
What answer did the teacher give??

[tianzhu]

Hi LiteracyICare


You’re welcome.

Best wishes

[chrisu]

Thanks Mrs.Wong, the answer given by teacher is 450. It’s before giving the 1/3 or 1/5 to Rahmad.