Q&A - P3 Math

[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

[Sun_2010]

jwxh:

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

haha, you are thinking too much 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

http://i50.tinypic.com/6xrs4y.jpg\">

[jwxh]

tks, everyone

[jessielu]

Need some help to solve the below qn:


Mr Tan bakes some curry puffs to give to his neighbours. If he gives 5 curry puffs to each neighbour, he will have 3 extra. If he gives 7 curry puffs to each neighbour, he will need 13 more. How many curry puffs did Mr Tan bake?

[tianzhu]

jessielu:

Need some help to solve the below qn:


Mr Tan bakes some curry puffs to give to his neighbours. If he gives 5 curry puffs to each neighbour, he will have 3 extra. If he gives 7 curry puffs to each neighbour, he will need 13 more. How many curry puffs did Mr Tan bake?

Hi

There are a few ways to do this question.

One possible way is to look from this angle.

To give 2 (7-5) more curry puffs to each neighbor, Mr Tan needs 16 (3 + 13) more curry puffs.

Number of neighbours ------- 16/2 ------- 8

Number of curry puffs baked by Mr Tan ------- 8*5 + 3 ------- 43

or 8*7 - 13 ------ 43

Best wishes