Q&A - P5 Math

[ksme]

ozora:

thanks for both the answers. It is great help to me but the 2nd question involved in the use of algebra. The kids are not taught. is there any other method?

Ozora,
Think answer for Q2 is units method. Anyway, you can draw out the models and compare before and after model to get the same answer. I don't know how to draw models with my computer so maybe wait for some other parents to provide the model approach.

[ozora]

ksme:

ozora:

thanks for both the answers. It is great help to me but the 2nd question involved in the use of algebra. The kids are not taught. is there any other method?

Ozora,
Think answer for Q2 is units method. Anyway, you can draw out the models and compare before and after model to get the same answer. I don't know how to draw models with my computer so maybe wait for some other parents to provide the model approach.

sure thanks.

[MathIzzzFun]

ozora:

ksme:

[quote=\"ozora\"]need guide in these 2 questions


q2. Apple and Berth had a total of $300 to spend.
Apple spent thrice of the amount she has left while Berth spent twice of the amount she has left. Given that the 2 total friends had a total of $90 left, how much did they have at first?

Ozora,
Here's my working:
Let A be 1 unit of Apple's amount.
Let B be 1 unit of Berth's amount.

At the beginning : 4A + 3B = $300 ......(1)

At the end : A + B = S$90
=> 3A + 3B = $90 x 3 = $270..... (2)

Comparing (1) and (2) => A = $30

Since Apple has 4units at first, she will have $30 x 4 = $120

Total at first is $300. Therefore, Berth's share at first is $180.

My workings is not very elegant. Maybe others have a more elegant way to work this out.

Hope this helps.

thanks for both the answers. It is great help to me but the 2nd question involved in the use of algebra. The kids are not taught. is there any other method?[/quote]Hi

hope this helps.. the kids were taught to solve the \"stars & moons\" sums in P1/P2 which is really algebra in pictorial form..

http://i53.tinypic.com/25ztdfa.jpg\">


cheers.

[tianzhu]

bbkoala:

Hi tianzhu


Thanks for your fast response.

Haha...to think that I finally understood the question after looking at your answer!

Lucky my gal asked me to post on KSP if I can't figure out the answer

Hi

Good Morning.

You're welcome.

Best wishes

[ozora]

.[/quote]

Hi

hope this helps.. the kids were taught to solve the \"stars & moons\" sums in P1/P2 which is really algebra in pictorial form..

http://i53.tinypic.com/25ztdfa.jpg\">


cheers.[/quote]
really thanks, tianzhu

[ozora]

Need guide on these questions.

Ahmad spent $12.80 more than Ryan and 4 times as much money as Vincent. The 3 boys spent $118.60 altogether. How much money did Vincent spend?
My answer
12.80 x 1/4 =3.20
118.6-3.2-12.8= 102.6
102.6/ 9 =11.4
11.4 + 3.2= $14.60. Is it correct?

2. the number of apples at a store was 80% more than the number of oranges. After 60% of the oranges were sold, there were 42 more apples than oranges. Findthe total number of apples and oranges at first.

[MathIzzzFun]

ozora:

Need guide on these questions.

Ahmad spent $12.80 more than Ryan and 4 times as much money as Vincent. The 3 boys spent $118.60 altogether. How much money did Vincent spend?
My answer
12.80 x 1/4 =3.20
118.6-3.2-12.8= 102.6
102.6/ 9 =11.4
11.4 + 3.2= $14.60. Is it correct?

2. the number of apples at a store was 80% more than the number of oranges. After 60% of the oranges were sold, there were 42 more apples than oranges. Findthe total number of apples and oranges at first.

Hi

Q1 - yes.. you may want to add $12.80 to the total ie 12.80 +118.60 = 131.40 and this will be equal to 9u, 1u = $14.60 = Vincent's money.

Q2. Apples : Oranges = 180 : 100 = 9u : 5u, total 14u
after 60% oranges sold, oranges left = 0.4 x 5u = 2u
so 9u-2u = 42, 7u=42, 1u =6

Total number of fruits at first : 14u = 84, 54 apples & 30 oranges.

cheers.

[ozora]

MathIzzzFun:

ozora:

Need guide on these questions.

Ahmad spent $12.80 more than Ryan and 4 times as much money as Vincent. The 3 boys spent $118.60 altogether. How much money did Vincent spend?
My answer
12.80 x 1/4 =3.20
118.6-3.2-12.8= 102.6
102.6/ 9 =11.4
11.4 + 3.2= $14.60. Is it correct?

2. the number of apples at a store was 80% more than the number of oranges. After 60% of the oranges were sold, there were 42 more apples than oranges. Findthe total number of apples and oranges at first.

Hi

Q1 - yes.. you may want to add $12.80 to the total ie 12.80 +118.60 = 131.40 and this will be equal to 9u, 1u = $14.60 = Vincent's money.

Q2. Apples : Oranges = 180 : 100 = 9u : 5u, total 14u
after 60% oranges sold, oranges left = 0.4 x 5u = 2u
so 9u-2u = 42, 7u=42, 1u =6

Total number of fruits at first : 14u = 84, 54 apples & 30 oranges.

cheers.

oic. thanks

[Chenonceau]

Could someone help with this question? http://i53.tinypic.com/2dhwhtt.jpg\">

[kittybank]

This question appeared in a revision paper: Answer is 2.4km but no solutions given. Could the gurus here help? :thankyou:


Andy, Benjamin and Charles travel from Town X to Town Y. They leave Town X at the same time. Andy drives at 56km/h, Benjamin walks at 8km/h and Charles walks at 7km/h. Andy gave Benjamin a lift at the start of journey to travel a part of the journey and then comes back to pick up Charles. They arrived at Town Y at the same time. If Benjamin walks 2.8km, how far does Charles walk?