Q&A - P3 Math
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its cool your son think of fraction of ratio, but ratio is not the same as fraction, they are merely the equivalent ways to describe a relation. It’s just an issue of notation. Is this what drag in folks from NIE?
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wah this is a very sad story. However your son could have been a maths genius! How did he even get to learn ratios in p3 or 4 already?
Did you send him for maths competitions?
Unless your son present in an unorthodox way otherwise the marker must be lousy. -
CoffeeCat:
its cool your son think of fraction of ratio, but ratio is not the same as fraction, they are merely the equivalent ways to describe a relation. It's just an issue of notation. Is this what drag in folks from NIE?
Don't know lah. Because I got 4 parties to prove the answer was right since they insist I was not an expert. I got the author of the textbook they are using, MOE maths specialist (They call her that), singaporemaths website person, and a HOD from a gifted Sec school. They all agreed.
This notation is just for argument sake. He did not use this 'logic' in this question. He merely drew a line across 2 ratios, separating them. In the end, when they could not find any error, they said a fraction involving 2 ratios cannot be used, but they should know this cannot be what he was doing. Another mistake he made was to cancel those numbers because he made a mistake in writing them, then wrote the right answers next to these canceled numbers. They said this was 'reducing'. Which again was not true.
Bottom line is, they just want him to be wrong. So be it lor.
What I taught my son: from then on, use a correction tape. Then they said no, so I told him to cancel everything and redo.
As to whether a fraction involving 2 ratios is correct or not, I think that really depends on the context as well. Also don't like to argue about such things lah... not important ma... That was his way or organizing his thoughts. -
CoffeeCat:
CoffeeCat, my son has never attended a single tuition class nor has he ever attended any enrichment class. He does his maths by staring in the air. Not sure where he learnt ratio from though... maybe from books or from surfing? Just like my other son, who understands negative numbers at 7 years old, from don't know where.wah this is a very sad story. However your son could have been a maths genius! How did he even get to learn ratios in p3 or 4 already?
Did you send him for maths competitions?
Unless your son present in an unorthodox way otherwise the marker must be lousy.
But it's ok... the older boy has already moved on to something else. Now, I don't get involved in Pri Maths anymore, so I will not feel guilty for fighting for them and getting them into trouble again. Whatever the teacher say will be. -
I note that usually the teachers have a standard answer marking scheme, so if the answer provided by the child differs in working, rigid teachers consider them as wrong. I personally feel that it is not right to penalise kids for such "errors". On one hand, children are told to "think out of the box" but on the other hand, they are being penalise for doing so…
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The education system was originally formulated as a factory assembly style system in order to produce workers who are obedient (and not questioning) and similarly skilled after the industrial revolution. I read somewhere that the idea of schooling is actually a relatively recent development. Even though MOE has tried to make changes, sadly whatever faults left lies with the original design of the system.
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Need help on this P3 math question:
The cost of 7 erasers and 3 rulers is $5.05.
The cost of 2 erasers and 6 rulers is $3.95.
Find the cost of 2 erasers and 2 rulers.
Thank you. -
chokos:
Add them up ....u get cost of 9 erasers and 9 rulers.Need help on this P3 math question:
The cost of 7 erasers and 3 rulers is $5.05.
The cost of 2 erasers and 6 rulers is $3.95.
Find the cost of 2 erasers and 2 rulers.
Thank you. -
How to solve the P3 math question:
There were a total of 50 cockroaches and spiders in a container.
There were 356 legs altogether.
How many cockroaches were there in the container?
Answer is 22 cockroaches. -
There were a total of 50 cockroaches and spiders in a container.
Assume all are cockroaches = 50x6 = 300 legs
356-300= 56
Different between the cockroaches legs = 8-2
No. of spider =56/2 = 28
No. of cockroaches = 50-28= 22
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