Q&A - P3 Math

[James Ang]

Tranquility8706:

Kindly help with these qns


1) Wendy had 55 more stickers than Susan.
After Wendy give away 155 of her stickers to Yvonne
Susan had 3 times as many stickers as Wendy
How many stickers did Susan have?


2) There are 400 pupils in Primary Three.
288 pupils like Mathermatics and 182 pupils like Science.
All pupils like at least Mathermatics or Science.
How many pupils like both Mathermatics and Science?

Thank you

1.

155-55 = 100
3u-1u=2u =>100
3u=>150

Susan has 150 stickers

2.

288+182-400=70

70 pupils like both

[Tranquility8706]

john.316:

QN 1 answer is Susan has 150 stickers


QN 2 There are 142 pupils like Math and Science.

Am I getting the correct answer? Pls let me know. Thank u!

Hi John,

Thanks alot.
I am still waiting her teacher return the paper back to my dd.
Will let you know once I got it.

Thank you

[James Ang]

john.316:

QN 1 answer is Susan has 150 stickers


QN 2 There are 142 pupils like Math and Science.

Am I getting the correct answer? Pls let me know. Thank u!

how did you get 142?

[tianzhu]

Hi

Hope this helps

http://farm4.static.flickr.com/3552/3816681348_9e16311e67_o.jpg\">

http://farm4.static.flickr.com/3440/3816681432_40f93f0256_o.jpg\">

[Tranquility8706]

Thank you very much… Tianzhu

[john.09525316]

[quote]how did you get 142?[/quote]
Sorry I have made a silly and careless mistake.
It should be 70.

[owlparents]

Hi,


I have this Maths problem from Pei Chun P3 SA2 2008. Pls help. Thanks.

Grandpa has some stamps. If he gives 6 stamps to each of his grandchildren, he will have 5 stamps left over. If he gives 8 stamps to each of his grandchildren, he will be hsort of 9 stamps.

a) How many grandchildren does Grandpa have?

b) How many stamps does Grandpa have?

[radiantmum]

I can’t sleep so keeping myself occupied solving maths problem.


Owlparents, (a) 7 & (b) 47

6x+5 = 8x - 9
14 = 2x
7 = x

Oh but wait a minute - does P3 knows algebra?

[owlparents]

Thanks RadiantMum! Your answers are correct. But no algebra for P3.


Any other methods? Thanks.

[radiantmum]

Hi owlparents,


sorry it took a little while as I have no idea what P3's current methods are (now you know i belong to the old algebra generation :oops: ). I was
referring to page 1 of this thread based on Lizawa's method ...

multiple of 6s: 6, 12, 18, 24,30,36, 42
(+5 since extra 5 stamps) : 11,17,23,29,25, 41, 47

multiple of 8s: 8, 16, 24, 32, 40, 48, 56
(-9 since short of 9 stamps) : -1, 7, 15, 23, 31, 39, 47

So 47 is the matching answer and if you count by blocks, it's 7 !

Geez, why cant they teach algebra if they want to make maths so difficult for P3 :shock: