Q&A - P5 Math

[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?

[elkniwt]

Hi Chenonceau,


Let me try ..

Based on the figure,
YC = YA, i.e. Angle YCA = (180 - 118)/2 = 31 (base angles of isos triangle)
Angle ACB = Angle YCA + Angle YCB = 31 + 47 = 78
Since ABCF is a rhombus, then AB = BC, Angle CAB = Angle ACB
Angle ABC = 180 - 78x2 = 24 (sum angles in a triangle)
Angle EDC = 180 -24 = 156 ( interior angles, AB // FC // ED)

Hope there's no calculation error.

Regards.

Chenonceau:

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

[Chenonceau]

elkniwt:

Hi Chenonceau,


Let me try ..

Based on the figure,
YC = YA, i.e. Angle YCA = (180 - 118)/2 = 31 (base angles of isos triangle)
Angle ACB = Angle YCA + Angle YCB = 31 + 47 = 78
Since ABCF is a rhombus, then AB = BC, Angle CAB = Angle ACB
Angle ABC = 180 - 78x2 = 24 (sum angles in a triangle)
Angle EDC = 180 -24 = 156 ( interior angles, AB // FC // ED)

Hope there's no calculation error.

Regards.

Chenonceau:

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

Thank you!!

[MathIzzzFun]

wormy:

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?

Hi

http://i51.tinypic.com/2qi4miv.jpg\">

cheers.