Q&A - P3 Math

Academic support for Primary 3
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mother777
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Re: Q&A - P3 Math

Post by mother777 » Sat Mar 16, 2013 1:05 pm

Ha ha ha ok.. Lets help each other then. No tuition for dd except Chinese this year.. All other subjects are taught by me and hubby at home..

So have to teach myself first before teaching her :)

raghupavithra
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Re: Q&A - P3 Math

Post by raghupavithra » Mon Mar 18, 2013 9:11 pm

i want top school question papers.i dont want online websites. so many of them sell . which one is good
help me

mars69
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Re: Q&A - P3 Math

Post by mars69 » Tue Mar 26, 2013 10:17 am

Need help please....

A man is 4 times the age of his son. 4 years ago, the man was 6 times the age of his son. What are the ages of the man and his son?

Still stuck on algebra....

Garfieldpal
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Re: Q&A - P3 Math

Post by Garfieldpal » Tue Mar 26, 2013 12:02 pm

mars69 wrote:Need help please....

A man is 4 times the age of his son. 4 years ago, the man was 6 times the age of his son. What are the ages of the man and his son?

Still stuck on algebra....
Let x years old be the age of his son.

The man's age will be 4x years old.

Four years ago, the son's age is (x-4) years old.

Hence the man's age is 6*(x-4) = (6x-24) years old.

Form an equation with the man's current age and his age 4 years ago.

You should get:

6x-24+4 = 4x

2x-20 = 0

x = 10

The son's age is 10 years old and the man's age is 40 years old.

I don't remember primary three math to be so complicated.

mars69
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Re: Q&A - P3 Math

Post by mars69 » Tue Mar 26, 2013 12:25 pm

Thanks, but I need help with modeling for this question. I'm still stuck in algebra days, so can't help my kid with models....


tianzhu
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Re: Q&A - P3 Math

Post by tianzhu » Tue Mar 26, 2013 12:28 pm

mars69 wrote:Need help please....

A man is 4 times the age of his son. 4 years ago, the man was 6 times the age of his son. What are the ages of the man and his son?

Still stuck on algebra....
Hi

Hope this helps.

Best wishes

Image

mars69
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Re: Q&A - P3 Math

Post by mars69 » Tue Mar 26, 2013 1:26 pm

Ah! I see. Thanks very much, tianzhu!

GreenQ
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Re: Q&A - P3 Math

Post by GreenQ » Thu Mar 28, 2013 6:01 pm

Dear parents, need your help to solve this Equal Concept word problem. Model is required. Thanks!

James and Kim shared some cookies equally.
After James gave Kim 28 cookies, Kim had twice as many cookies as James.
How many cookies did each of them receive at first?

tianzhu
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Re: Q&A - P3 Math

Post by tianzhu » Thu Mar 28, 2013 7:29 pm

GreenQ wrote:Dear parents, need your help to solve this Equal Concept word problem. Model is required. Thanks!

James and Kim shared some cookies equally.
After James gave Kim 28 cookies, Kim had twice as many cookies as James.
How many cookies did each of them receive at first?
Hi

Hope this helps.

Best wishes

Image

GreenQ
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Re: Q&A - P3 Math

Post by GreenQ » Thu Mar 28, 2013 8:08 pm

Great! :thankyou: tianzhu for your prompt reply! :smile:

Your model /graphic is really clear, interesting and easy to understand. :cool: Thank you very much!

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