Sign Up!
Login
Welcome to Test-paper.info
Tuesday, December 12 2017 @ 07:49 PM CST
 Forum Index >  Test Paper Related >  Primary 6 Matters
 P6 Maths! 2012 Pei Chun CA1 Paper 2
   |  Printable Version
By: geniuskids (offline)  Friday, March 01 2013 @ 07:22 AM CST (Read 1150 times)  
geniuskids

Hi there, pls help solve this questions:-

Q10. Mrs Song has some money to buy apples and pears. If she buys 5 apples and 2 pears, she will have $2.05 left. If she buys 2 apples and 7 pears instead, she will need another $2.30. If an apple costs $0.55, how much money does Mrs Song have?

Answers:$7.20

Thanks

Forum Active Member
Active Member


Registered: 11/12/11
Posts: 169

Profile Email    
   
By: echeewh (offline)  Friday, March 01 2013 @ 05:19 PM CST  
echeewh

hey there

Following pls find my worked solution:

<5A + 2P>
|------------|<- 205 ->|
|-------------------------|<- 230 ->|
<------------- 2A + 7P ----------->


Using <Gap & Difference> method, we have ...

2A + 7P - (5A + 2P) = 205 + 230
2A + 7P - 5A - 2P = 435
5P - 3A = 435

Given that 1A = 55 cents, we have ...

5P - (3 × 55) = 435
5P - 165 = 435
5P = 435 + 165 = 600
1P = 600 ÷ 5 = 120

Amt of money = (5A + 2P) + 205
= (5 × 55) + (2 × 120) + 205
= 275 + 240 + 205
= 720

Mrs Song has $7.20 at first.

==============

Trust this helps.

Do let me know again if there's further clarification.

Cheers,
Edward

Forum Active Member
Active Member

Registered: 04/21/11
Posts: 627

Profile Email    
   
By: geniuskids (offline)  Friday, March 01 2013 @ 08:09 PM CST  
geniuskids

Many thanks ! Edward.

Forum Active Member
Active Member

Registered: 11/12/11
Posts: 169

Profile Email    
   


 All times are CST. The time is now 07:49 pm.
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