Q&A - P4 Math

[teh_oh]

htn:

Hi,need help for the following:


1.James has 36 blue marbles and 54 red marbles. He wants to put an equal number of blue and red marbles into somes boxes. How many boxes does he need at most?

Hi htn,

Is the answer 18?

Factors of 36 : 1,2,3,4,6,9,12,18,36
Factors of 54 : 1,2,3,6,9,18,54

[htn]

chloecube:

htn:

Hi,need help for the following:


1.James has 36 blue marbles and 54 red marbles. He wants to put an equal number of blue and red marbles into somes boxes. How many boxes does he need at most?

2.Esther spent 1/2 of her money on some pies and 4/7 of her remaining money on 8 loaves of bread. Each loaf of bread cost thrice as much as a pie. How many pies did she buy?

TIA

is the answer for nos 2, 42 pies?

Hi Chloecube,

Yes, the answer is 42. Can you show me how u get the answer?

TIA.

[htn]

teh_oh:

htn:

Hi,need help for the following:


1.James has 36 blue marbles and 54 red marbles. He wants to put an equal number of blue and red marbles into somes boxes. How many boxes does he need at most?

Hi htn,

Is the answer 18?

Factors of 36 : 1,2,3,4,6,9,12,18,36
Factors of 54 : 1,2,3,6,9,18,54

Hi teh_oh,

I also get 18, however the answer given is 9.

[small]

[quote]2.Esther spent 1/2 of her money on some pies and 4/7 of her remaining money on 8 loaves of bread. Each loaf of bread cost thrice as much as a pie. How many pies did she buy?


TIA[/quote]
Hi htn,

HTH..

http://i40.tinypic.com/2d7u6aq.jpg\">

[elisammom]

Hi

Anyone can help me solve this question?


Ms CHUA spent $1331 on 40 CDs and DVDs. Each cd cost $17 and each DVD cost $48. How many CDs did she buy?

Thanks

[tianzhu]

elisammom:

Hi

Anyone can help me solve this question?

Ms CHUA spent $1331 on 40 CDs and DVDs. Each cd cost $17 and each DVD cost $48. How many CDs did she buy?

Thanks

Hi

Besides Guess and Check, you may also use “Make A Supposition”

If all were DVD

40*48 ----- 1920

1920 – 1331 ------ 589

Difference in cost between DVD and cd ------ 48 - 17 -----31

Number of cd ------- 589/31 ------19

Best wishes

[elisammom]

Hi tianzhu


Thanks so much.
Wondering if model method can be used to solve this prob?

Thanks

[tianzhu]

elisammom:

Hi tianzhu


Thanks so much.
Wondering if model method can be used to solve this prob?

Thanks

Hi

MD is one of many problem solving heuristics in primary school maths. It’s not the only one.

Of course, students may draw some form of visual representation if they think MD might help them to see the solutions.

There were some examples in earlier posts.

Best wishes

[MathIzzzFun]

elisammom:

Hi tianzhu


Thanks so much.
Wondering if model method can be used to solve this prob?

Thanks

Hi

questions like this can also be solved using the area model ...

http://i50.tinypic.com/11izp79.jpg\">

cheers.

[elisammom]

:thankyou: All