Q&A - PSLE Math

[tianzhu]

MathIzzzFun:

mummyv:

MathIzzzFun thanks for the link to the earlier ques I posted.


Pls help with this question.

ABCD is a square. There are 2 smaller squares shaded in grey inside ABCD. Express the shaded squares as a fraction of ABCD. Thanks http://i49.tinypic.com/2eumkwj.jpg\">

Can u re-post the pic, not visible.......thkq

cheers

Hi

The two shaded areas are of different sizes.

The lower square is 1/4 of ABCD.

Divide the top square into 4 equal triangles.

The top square is 4/18 or 2/9 of ABCD.

Fraction of ABCD which is shaded ------ 1/4 + 2/9 ------ 17/36

Best wishes

[mama_10]

need help!


what is the place value of digit 3 in 902.31?
the answer key is tenths but my kid said is 0.3.
what is place value?

thank you.

[mama_10]

need help on Nanyang 2011 CA1 paper 1, question 29.


thank you.

[mama_10]

quote="Mum1113"]Hi, kindly help this pls, thanks!


Jack,.Meili and Raj shared some 50 cent coins.
They each had an average of 28 coins.
The total amount of money that Jack and Meili had was $7 more than
the total amount of Jack and Raj had.
If Raj’s amount was 4 times of Jack’s amount, how much more money
did Meili have than Jack?[/quote]
Hi

Where is this question from?

Please help to confirm the numbers from your source.

Best wishes[/quote]
This is Rosyth 2012 ca1 q14. No ans provided.

my attempt

Total money 28 x 3 x $0.50 = $42

J - u
R - u u u u
M - u u u u $7

1u = ($42 - $5)/9 = 35/9
M-J = 3u +$7 = (3 x 35/9) + $7 = $18 2/3[/quote]

As no guided answer was provided, my son got his answer: $17.50 .
what’s the correct answer?[/quote]

I also got the answer $18 2/3.
What is the correct answer?
Thank you.

[tianzhu]

mama_10:

need help on Nanyang 2011 CA1 paper 1, question 29.


thank you.

Hi

Pay attention to the product of the diagonals and see the pattern.

The answer is 30c.

Best wishes

[mummyv]

Thks Tianzhu and MathIzzFun

[mama_10]

tianzhu:

mama_10:

need help on Nanyang 2011 CA1 paper 1, question 29.


thank you.

Hi

Pay attention to the product of the diagonals and see the pattern.

The answer is 30c.

Best wishes

Hi Tianzhu,
:thankyou:
its not easy.

[Jolyn]

Dear Guru Master


Appreciate if you could help as soon as possible.... Thanks a million

Every time Nora saved 70 cents, her father put another 20 cents into her savings. When Nora had $23.40 in her savings, how much of it had been put in by her father?

[mama_10]

nora father total

0.7 0.2 0.9

total $23.4
$23.4/$0.9 = 26 sets of $0.7 and $0.2.

26 x $0.2 = $5.2

Am I right ?

[Jolyn]

Thanks a million mama_10...