Q&A - P3 Math

[ponyo]

[quote]Hi,


Are you sure the problem is correct? After Mary gives 2 book marks to June, she can't have the same number as before?[/quote]I had the same idea too. But if you read again, I think what they are saying is that in the beginning, Mary had 3x more, so it essentially means that Mary had 4 x as much as Jane and after Mary gives 2 book marks, she had 3x as many as Jane. The phrasing of the question could have been better.

My answer: Jane had 8 in the beginning and Mary has 32. Use the comparison Before and After. Don't know how to post the model here....

[BigDevil]

fohope:

Hi,

Kindly advise how to do this problem with model. Thanks in advance for the answer.

Mary had 3 times more bookmarks than June.
After Mary gave 2 bookmarks to June, Mary had 3 times as many bookmarks as June.
How many bookmarks did June have at first?

Is the answer 8?

[Sun_2010]

http://i47.tinypic.com/ouy2oj.jpg\"> http://i45.tinypic.com/adzwj9.jpg\">

[ponyo]

Thanks Sun_2010.

This is the drawing.
Just a quick question: How do you post the model?

[fohope]

Hi all,


The question is correct and answer is 8.
Thanks for all the replies.

[Sun_2010]

ponyo:

Thanks Sun_2010.

This is the drawing.
Just a quick question: How do you post the model?

I just use excel. then copy and paste in paint and save it as a file. Then upload using the tiny pic.

Experts use much nicer and colourful models, havent asked them what they use till now ...


calling ksi, BD ...

[BigDevil]

That's pretty much what I do too.

But I fill the boxes with colours...hence more colourful.

[ponyo]

Thanks Sun_2010. Next time I will try to post the models. A pix says a thousand words…

[peapot]

Pls help me with q:

Mrs Teo weighed 48kg more than Ms Law 3 months ago. After completing an exercise programme, Mrs Teo lost 10kg. She is twice as heavy as Ms Law now. How heavy was Mrs Teo 3 months ago?

[Suz855]

peapot:

Pls help me with q:

Mrs Teo weighed 48kg more than Ms Law 3 months ago. After completing an exercise programme, Mrs Teo lost 10kg. She is twice as heavy as Ms Law now. How heavy was Mrs Teo 3 months ago?

Teo [_____][_____48]
law [_____]

After
Teo[______][______]
1u-->48-10=38

Mrs Teo is 38+48=86kg 3 months ago.