Q&A - P3 Math

[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.

[peapot]

Ok, Thks.

[jwxh]

pls help to solve this problem. i need working and explanation plse.

A packet of beads was shared equally among 28 girls.
8 girls decided to give up their beads to the rest.
As a result, the rest of the girls recd 2 more beads each.
How many beads were there in the packet at first? Ans: 140

[ponyo]

jwxh:

pls help to solve this problem. i need working and explanation plse.

A packet of beads was shared equally among 28 girls.
8 girls decided to give up their beads to the rest.
As a result, the rest of the girls recd 2 more beads each.
How many beads were there in the packet at first? Ans: 140

As a result of the 8 girls giving up their beads, the remaining 20 (ie 28-8) girls received 2 more beads each.
So the 20 girls received 20*2=40 extra beads in total
The 40 beads came from the 8 girls, so it means originally the girls each had 40/8=5

This means that the 28 girls have 28*5 = 140 beads altogether