Q&A - PSLE Math

[faith2u]

Hi Dharma & Tang,


Thanks for both your respond. I am still trying to figure out the solutions using models method.

[dido]

[Moderator's note: Topics merged.]


Mr Tan had some apples and oranges in his shop. 30% of the fruits were oranges. He sold 70 apples and bought another 170 oranges. Then 65% of the fruits were oranges. How many did he have at first?

Who can help? Thanks!

[jedamum]

which level of math is it?

can post in the existing thread accordingly??
if you had missed it, please furnish the info on the level so that mods can do the merging.

[kaitlynangelica]

dido:

Mr Tan had some apples and oranges in his shop. 30% of the fruits were oranges. He sold 70 apples and bought another 170 oranges. Then 65% of the fruits were oranges. How many did he have at first?


Who can help? Thanks!

is the answer 105?

let x be the number of oranges.

170 + x =65%.

x = 65-170 = 105?

[small]

dido:

Mr Tan had some apples and oranges in his shop. 30% of the fruits were oranges. He sold 70 apples and bought another 170 oranges. Then 65% of the fruits were oranges. How many did he have at first?


Who can help? Thanks!

dido, I think Mr Tan had 300 apples and oranges at first.
Is this p5 or P6 question?

[small]

Managed to find the link for you, please find Dharma's working. .


http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=280&postdays=0&postorder=asc&start=525

[dido]

Hi,


This is P6 question. Sorry, don’t know which section to post.

I have no answer for this.

Cheers

[Dharma]

dido:

[Moderator's note: Topics merged.]


Mr Tan had some apples and oranges in his shop. 30% of the fruits were oranges. He sold 70 apples and bought another 170 oranges. Then 65% of the fruits were oranges. How many did he have at first?

Who can help? Thanks!

http://www.postimage.org/

[xpozay]

dido:

Hi,


This is P6 question. Sorry, don't know which section to post.

I have no answer for this.

Cheers

I believe this is a P5 question. I saw very similar questions in my daughters P5 book that her tutor uses.

[tianzhu]

Hi Dharma


I am wondering why you used units and parts for the number of people. For the number of adults and children, we are using the same measures to indicate the ratio representing the number of adults to the number of children. Likewise for the price of tickets, we are using the same units of measurement to represent the dollar values of the tickets.

How do you arrive at 1p/ (1u+1p) = 3/8?

This is not an easy question as students have to have clear understanding of the differences between the units representing quantity and those representing the dollars values.

Please help to explain.