Q&A - P3 Math

[kiasustar]

:thankyou: :udawoman: :udaman: :rahrah:

[HAPPYH]

kiasustar:

Cindy had twice as much as Ivy. After Cindy spent $36 & Ivy spent $12, Ivy had twice as much as much the money as Cindy. How much had Cindy left ?


Anyone can help? Thank u v much

Is the ans 12?

[HAPPYH]

HAPPYH:

kiasustar:

Cindy had twice as much as Ivy. After Cindy spent $36 & Ivy spent $12, Ivy had twice as much as much the money as Cindy. How much had Cindy left ?


Anyone can help? Thank u v much

Is the ans 12?

No i think I am wrong

[kiasustar]

As above, shld be $4

[peapot]

Hi Anyone can help?


The total mass of John and Daniel is 150kg. The total mass of Ramesh and Daniel is 142kg.
(a) how much heavier is John than Ramesh?
(b) if the total mass of the 3 boys is 224kg, how heavy is Daniel?

What I don’t understand is why 150-142=8 is the answer to show how much heavier is John than Ramesh??

[Thein]

[quote]Hi Anyone can help?


The total mass of John and Daniel is 150kg. The total mass of Ramesh and Daniel is 142kg.
(a) how much heavier is John than Ramesh?
(b) if the total mass of the 3 boys is 224kg, how heavy is Daniel?

What I don't understand is why 150-142=8 is the answer to show how much heavier is John than Ramesh??[/quote]J+D = 150 ------------(1)

R+D=142--------------(2)

Daniel is of same weight in both equations. So the difference in weight should be due to the difference of weight between John and Ramesh. Hence

J - R = 150 -142;

[Thein]

http://i48.tinypic.com/2yotog0.jpg\">

[peapot]

Hi Thein, thanks for your explanation. The box model abit too complicated for my girl. I will use the equation method that you show at first. Thanks.

[MathIzzzFun]

peapot:

Hi Thein, thanks for your explanation. The box model abit too complicated for my girl. I will use the equation method that you show at first. Thanks.

Hi

hope this MD will help to visualize the solution.

http://i47.tinypic.com/35a98ra.png\">

cheers.

[Thein]

Hi peapot


You are most welcome