Q&A - P5 Math (Page 175)

It is currently Sun Oct 26, 2014 6:05 am

All times are UTC + 8 hours




Post new topic Reply to topic  [ 5953 posts ]  Go to page Previous  1 ... 172, 173, 174, 175, 176, 177, 178 ... 596  Next
Author Message
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 5:58 pm 
Offline
Councillor
Councillor

Joined: Fri May 30, 2008 8:10 pm
Posts: 3722
elisammom wrote:
Hi pls help. This is the 2011 CA1 Nanhua paper
Image
TIA

Hi
You may use "Listing"

Total number of students for A, C,D and E ------- 77

Find multiples of 5 and 7 after 77

Multiples of 5 ------ 80,85,90,95

Multiples of 5 + 1 ------ 81,86,91,96

Multiples of 7 ------ 84, 91

Multiples of 7 + 5 ------ 89, 96

The common number is 96

Least number of students in B ------- 96-77 ------- 19

Hope this helps

Best wishes


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 6:44 pm 
Offline
GreenBelt
GreenBelt

Joined: Tue Nov 10, 2009 9:50 am
Posts: 129
Hi,

Please help....

Q1) Limeng is 10 years old and his sister is 7 years old . In how many years' time will their total age be 41 years?

Q2) A basket with 65 sweets has a mass of 3200g . The same basket with 40 sweets has a mass of 2125g. Each sweet has the same mass . What is the mass of the basket?


Many thanks!


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 7:39 pm 
Offline
GreenBelt
GreenBelt

Joined: Mon Nov 30, 2009 1:08 pm
Posts: 188
Please assist with this question:

There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?

Thanks!


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 7:42 pm 
Offline
KiasuGrandMaster
KiasuGrandMaster
User avatar

Joined: Wed Mar 09, 2011 11:49 pm
Posts: 2333
Sharmum wrote:
Hi,

Please help....

Q1) Limeng is 10 years old and his sister is 7 years old . In how many years' time will their total age be 41 years?

Q2) A basket with 65 sweets has a mass of 3200g . The same basket with 40 sweets has a mass of 2125g. Each sweet has the same mass . What is the mass of the basket?


Many thanks!


Q1.
Total age now --> 10+7=17
(41-17)/2 = 12 ...(both grow older by the same number of years)
Their total age will be 41 years in 12 years' time.

Q2.

Mass of (65-40)= 25 sweets --> 3200g - 2125g = 1075g
mass of 1 sweet --> 43g
Mass of basket --> 2125g - 40 x 43g = 405g

cheers.


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 7:43 pm 
Offline
OrangeBelt
OrangeBelt

Joined: Mon Jan 09, 2012 6:07 am
Posts: 73
tianzhu wrote:
elisammom wrote:
Hi pls help. This is the 2011 CA1 Nanhua paper
Image
TIA

Hi
You may use "Listing"

Total number of students for A, C,D and E ------- 77

Find multiples of 5 and 7 after 77

Multiples of 5 ------ 80,85,90,95

Multiples of 5 + 1 ------ 81,86,91,96

Multiples of 7 ------ 84, 91

Multiples of 7 + 5 ------ 89, 96

The common number is 96

Least number of students in B ------- 96-77 ------- 19

Hope this helps

Best wishes



Very clear! Thanks a lot!


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 7:49 pm 
Offline
KiasuGrandMaster
KiasuGrandMaster
User avatar

Joined: Wed Mar 09, 2011 11:49 pm
Posts: 2333
Trina wrote:
Please assist with this question:

There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?

Thanks!


Assume all boys donated, total amount --> 40 x $3 = $120
$120 - $30 = $90 --- excess amount to be reduced by girls' donation
Number of girls = $90/($3+$2) = 18
Number of boys = 40-18 = 22

cheers.


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 8:05 pm 
Offline
GreenBelt
GreenBelt

Joined: Mon Nov 30, 2009 1:08 pm
Posts: 188
MathIzzzFun wrote:
Trina wrote:
Please assist with this question:

There are 40 pupils in a class. Each boy donated $3 and each girl donated $2. The boys donated $30 more than the girls.
How many boys are there?
How many girls are there?

Thanks!


Assume all boys donated, total amount --> 40 x $3 = $120
$120 - $30 = $90 --- excess amount to be reduced by girls' donation
Number of girls = $90/($3+$2) = 18
Number of boys = 40-18 = 22

cheers.


Thanks but still dont get it.. Can provide narration? Thanks


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 9:01 pm 
Offline
BlueBelt
BlueBelt

Joined: Sat Mar 14, 2009 11:02 pm
Posts: 239
Luke had $140 and Issac had $92 at first. After they spent an equal amount of money, Luke had 4 times as much money as Isaac. How much did each of them spend?
(not sure if this has been asked before, pls refer me to correct page. Thanks!)


Top
 Profile  
 
 Post subject: Re: Q&A - P5 Math
PostPosted: Thu Jan 31, 2013 9:10 pm 
Offline
KiasuGrandMaster
KiasuGrandMaster

Joined: Mon Jul 26, 2010 4:01 pm
Posts: 1640
ttyh wrote:
Luke had $140 and Issac had $92 at first. After they spent an equal amount of money, Luke had 4 times as much money as Isaac. How much did each of them spend?
(not sure if this has been asked before, pls refer me to correct page. Thanks!)


3 units -> $140 - $92 = $48
1 unit -> $48 / 3 = $16

$92 - $16 = $76

Each of them spent $76


Top
 Profile  
 
 Post subject: Re: P5 Onsponge Conquer Problem Sums Answer key
PostPosted: Thu Jan 31, 2013 9:25 pm 
Offline
GreenBelt
GreenBelt
User avatar

Joined: Thu Jan 31, 2013 9:01 pm
Posts: 117
If you need the whole answer key, I don't think I could help. But if you just need some answers from the answer key, then you can go to the website. http://www.onsponge.com/shop/online-solutions.html
Hope I helped


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 5953 posts ]  Go to page Previous  1 ... 172, 173, 174, 175, 176, 177, 178 ... 596  Next




All times are UTC + 8 hours


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group