Sign Up!
Login
Welcome to Test-paper.info
Monday, September 25 2017 @ 10:21 AM CDT
 Forum Index >  Test Paper Related >  Primary 3 Matters
 P3 Maths Q Model solution please?
   |  Printable Version
By: Hweeps (offline)  Thursday, September 01 2011 @ 10:07 AM CDT (Read 1576 times)  
Hweeps

This type of question appeared a few times in past years' papers. Can someone provide a solution via the model drawing method ?
A has $349 in her wallet made up of only $2 and $5 notes. She has a total of 86 notes. How many $5 are there in the wallet?
The answer provided:
86 x 2 = 172
349 - 172 =. 177
5 - 2 =. 3
177 / 3. = 59
there are 59 $5 notes.
Thanks.

Forum Newbie
Newbie

Registered: 08/29/11
Posts: 2

Profile Email    
   
By: saslwp (offline)  Tuesday, September 06 2011 @ 12:51 AM CDT  
saslwp

Most sch or teachers will teach this using the guess and check method, meaning you build a table and
make a intelligent wild start to x number of $2 and y number of $5, and then narrow down to the correct
total amount and correct number of notes.
The answer you shown is normally taught to Olympaid students using the assumption method.
Explanation:
Assuming all the notes are of $2, there will be 86 x 2 = $172
349 - 172 = 177
All the $5 have been counted as if they are $2,
5 - 2 = 3
The difference in the value of $5 and $2 is $3.
177 / 3 = 59
Hence there are 59 $5 notes.

Hope this helps.

Forum Newbie
Newbie


Registered: 09/05/11
Posts: 2

Profile Email    
   
By: Hweeps (offline)  Tuesday, September 06 2011 @ 06:44 AM CDT  
Hweeps

Thanks. I figure out the explanation to the answer but still don't know how to draw a model to get the answer. Was told by a school teacher that a model can be drawn to find the solution to this kind of question. Can you help??

Forum Newbie
Newbie

Registered: 08/29/11
Posts: 2

Profile Email    
   
By: ZombieFreak (offline)  Wednesday, September 07 2011 @ 03:32 AM CDT  
ZombieFreak

Quote by: Hweeps

This type of question appeared a few times in past years' papers. Can someone provide a solution via the model drawing method ?
A has $349 in her wallet made up of only $2 and $5 notes. She has a total of 86 notes. How many $5 are there in the wallet?
The answer provided:
86 x 2 = 172
349 - 172 =. 177
5 - 2 =. 3
177 / 3. = 59
there are 59 $5 notes.
Thanks.



So easy also don't know.
Noob

Forum Junior
Junior

Registered: 10/29/10
Posts: 17

Profile Email    
   


 All times are CDT. The time is now 10:21 am.
Normal Topic Normal Topic
Locked Topic Locked Topic
Sticky Topic Sticky Topic
New Post New Post
Sticky Topic w/ New Post Sticky Topic w/ New Post
Locked Topic w/ New Post Locked Topic w/ New Post
View Anonymous Posts 
Able to Post 
HTML Allowed 
Censored Content