P2 Math - General Discussion

[CoffeeCat]

jedamum:

P2Q: Alice has 380 red and yellow marbles.

110 marbles are yellow.
how many more red marbles than yellow marbles does she have?

Query:
i would like to ask, besides the 'Part-Whole Model' to find out the number of red marbles, do we still have to draw the \"Comparison Model\" to find out how many more red than yellow marbles?

TIA.

hmm my method of drawing is different. I will draw the comparison model.
But i will illustrate the total by a big curvy curve. maybe times have changed. are models given marks? otherwise i presume model to be drawn only to help you see the relationship.

[jedamum]

CoffeeCat:

jedamum:

P2Q: Alice has 380 red and yellow marbles.

110 marbles are yellow.
how many more red marbles than yellow marbles does she have?

Query:
i would like to ask, besides the 'Part-Whole Model' to find out the number of red marbles, do we still have to draw the \"Comparison Model\" to find out how many more red than yellow marbles?

TIA.

hmm my method of drawing is different. I will draw the comparison model.
But i will illustrate the total by a big curvy curve. maybe times have changed. are models given marks? otherwise i presume model to be drawn only to help you see the relationship.

thanks coffee cat.
i 'see' your working.
not sure if model are marked cos my boy can get his working correct, but his models all wrong. :roll:

[jiyou2003]

Yesterday DS mention that the silencer reading on every Tuesday is on Maths. May I know what kind of books is that? Any recommendation?

Many thanks in advance.

[pokemon]

jiyou2003:

Yesterday DS mention that the silencer reading on every Tuesday is on Maths. May I know what kind of books is that? Any recommendation?

Many thanks in advance.

So far i hv never heard of silence reading to read on math. I think izit to read something on maths or number related books? My ds school only have 3days of english books and 2days of chinese books.

[corneyAmber]

pokemon:

jiyou2003:

Yesterday DS mention that the silencer reading on every Tuesday is on Maths. May I know what kind of books is that? Any recommendation?

Many thanks in advance.

So far i hv never heard of silence reading to read on math. I think izit to read something on maths or number related books? My ds school only have 3days of english books and 2days of chinese books.

Murderous Math?

[jesschan]

jiyou2003:

Yesterday DS mention that the silencer reading on every Tuesday is on Maths. May I know what kind of books is that? Any recommendation?

Many thanks in advance.

There are some simple books on Maths in the public libraries - they cover topics like counting, telling the time, money, shapes etc...in the non-fiction section.

[jiyou2003]

jesschan:

There are some simple books on Maths in the public libraries - they cover topics like counting, telling the time, money, shapes etc...in the non-fiction section.

Thanks this help, will drop by libraries over the weekend.

[corneyAmber]

http://i724.photobucket.com/albums/ww246/ks2me/P2MathTensOnes.jpg\">


Which would you choose?
1. 20
2. 29
3. 30
4. 210

Is this question considered tricky or ambiguous??? :?

[Way2GO]

Where did u get this question from?

From adult's viewpoint, it may look tricky.
(We see things or tend to read things dat may not be there?)

I asked my DS2.
His replied the answer is 210 and dat it is clear cut :roll:

[corneyAmber]

This is from St Hilda’s SA1 2009.


The model answer is 30.
My dd’s answer is also 210.

If the model answer is wrong, then no ambiguity.

Anyone from St Hilda’s P3 can confirm if the model answer is wrong?

I have 2 concerns though:
1. The quality of model answers from these papers.
2. Ambiguous question versus tricky question, sometimes adults mixed them up.