Using unit equalization.

½ x 10 x 15 = 75

Answer is 75

If u see carefully, the big and small rectangle shaded portions is half. As a whole rectangle, is actually asking for half of the rectangle 15x10=150 150/2=75cm

Thanks...

At first, oranges-60% and apples-40% a) Oranges =192 60%=192 10%=192/6 =32 40% = 32 x4 = 128

b) 192 x 3 = 576 576+128=704 2/3=apples 1-2/3=oranges 2/3=704 1/3=352 Not sure whether it is right or not. Others please help. Thanks.

part b others please help.Thanks

B) 87x2=174 C) let circle=a and triangle=b Number of b= a-1 a+a+a-1=323 a+a+a=324 a= 324/3 = 108 And: figure 108

No need sq root. P3 haven't learn. Just use 10x10 / 50 = 2

Draw the diagrams u will understand

Ok thanks

Can share your photo?

HxH=50 SxSxHxH=100 So, SxS=2

This question is more for enrichment.

◻️✖️◻️✖️♥️✖️♥️=10x10 ◻️✖️◻️✖️50=100 ◻️✖️◻️=100/50 =2 You muz see the similarity of the model like ♥️✖️♥️&◻️✖️♥️ ( the similar is ♥️)

Actually we were in j8 and we were recommended with one online programme. We find very enriching for our kid. (My kid p1 but has strong interest for maths.) The daddy could solve this but still many of you could provide even more working. We are considering taking up. $39.90. Thanks everyone for the help!

P3 Maths is so difficult!

I'm from India .... I have become a great Fan of Singapore Math :)

Our answer

We used this question to test the p4 girls. These girls are from the top class in one of the primary school in the west. Apparently, they can't figure out. As far as we had concluded it is challenging

Same as mine

This question is not appropriate for primary school assessment because H and S are not whole numbers. It is too abstract that HxH and SxS are whole numbers, while H and S are not.

I agree with you Mr.kho tek hong

Actually I encounter this similar problem in P2 but it is in addition and subtraction not multiplication.

Regardless the level, this question is still good as enrichment to stretch abstract thinking, but not as assessment. Teachers much be ready to back up students' responses, including confusion.

Who days no such thing as Singapore math? http://www.singaporemath.com/Singapore_Math_Story_s/10.htm It's a ® mark ok

"Singapore Math" (American spelling) is the brand name for the curriculum / syllabus taught in Singapore. In Singapore, we just call it "Maths" or "macks". :-)

I think there would be some P3 students who can think this way: When 1 heart is replaced by a square, the outcome is divided by 5. So when the same action is applied one more time, divide by 5 again, and we'll have the answer 2.

Here is the answer : 2

I don't think this is P3 question. You can't get two same heart multiply to get 50. The nearest is 7x7 = 49

You don't need to get individual value of heart in order to get the answer

Some times we need to be flexible .

Enrichment ok, but not for assessment.

This is not about flexibility. It is more on common sense.This question shouldn't be introduced to P3 in the first place as scientific calculator in not available. If a student ask what is the value of one square nobody would be able to answer

There is no whole number that multiplies itself and give a total of 50.

There is absolutely no need to know the individual value of either the heart or the square.

Box x box = 5 Box is not 5 So u cannot sub like that, Kelvin Koh

I guess when a question is designed once need to be able to take a scenario where a curious student may ask, "so, what is the answer for one square?" don't tell me your answer is "there is no answer for one square? "

Oh ok, I thought the answer was box = 2, it shd be box X box = 2, thanks Ariel

Have. Sqrt2 loh

Welcome, Kelvin Koh

To those students who are curious to ask about the individual value, then we should take the time to explain to them what is square root all about.

Still don't agree, unless u able to tell me the answer without scientific calculator

No calculator can tell you the exact answer anyway, since square root 2 is irrational.

Exactly, that's y it is not suitable for p3

Pegging learning strictly by age is outdated, just teach whatever the child is curious about.

This question is more appropriate for Sec 1. There is a long method as well as a short method. The short method does not require students to find the values of H and S.

U all too 死心眼. There is no need to find the value of one heart nor 1 box. So no need scientific cal.

Anyway, since I din found this question from any assessment book from popular. The debate over the level is not that impt la. 別伤和气

www.beautyful.ly

This is how I found out the question. I feel it is more suitable for kid who has inquisitive mind.

Once again, thanks for all the help given here!

Shirley Lee, use this chance to introduce square numbers 1, 4, 9, 16, 25, ...

explain that since 50 is not a sq number, we can't find the exact value of Heart so we just look at the final product required instead

may I use this chance to invite P3 parents to join us at https://www.facebook.com/groups/therealparents2006/ sorry that we only admit real parents at the moment so if u dont get approved after awhile, do check your "others" inbox, u may have to do verification.

Jason Lee

I do not understand root 2 ...

Im sure that who designed this riddle has failed unless it was intended for super advanced calculus students

because ⬛ x ♥ =10 , then ⬛ is ♥/5 ♥/5 x ♥/5 =50/25 ⬛ x ⬛ =2 the idea is to emphasize logic over math knowledge. Until they reach sec school, when they can discard logic in favour of math theorem😂

so, the answer is not 666?

2

Is algebra in p3 syllabus?

Note that all numbers obey algebraic laws, for example a * b = b * a, even if not formally listed in P3 syllabus. In primary school, these concepts are taught from a Concrete matter, then to Pictorial, then to Abstract. So they will be exposed to examples illustrating 3*5=5*3, 6*7=7*6, 2*9=9*2 ... Hopefully they "get the idea".

If numbers are a flower garden, then algebra is like looking at the garden from a helicopter. Some people, who have walked the garden long enough to be familiar with it, are able to imagine how the helicopter view looks like.

Which online program? Can pm me?

Later I share here. I not at home. All info at home.

actually, there is no such thing as Singapore Math. But the curriculum designers sourced the best ideas from educational research and put that into the curriculum, trained the teachers and implemented that. by and large, we set very high standards for our school tests and exams. But many pupils struggle.

I agree but it is still good to filter out those good one. With that I feel PSLE should be moderate according to national average.

Dr Kho Tek Hong is one of the inventors of "Singapore Mathematics". He is the Guru!

Thanks for your information

It's an honour for him to be with us in this group!

I got this question from a programe not assessment.

huh? isn't the T-score normed according to bell-curve already?

Can set the question easier la. No more bell curved after this year

OK, although I worked in MOE decades ago, I am not a spokesman for MOE. but if you set the questions easier, then everybody scores high marks, then how to distinguish and post students to different secondary schools? i think they use a computer program to do that.

Haha i think after this year will be new era.

Can you share here so others can learn too

Disagree, seems like u not aware P3 syllabus

I don't understand, if answer is 2, then heart is 5 as 2x5 =10, but why 5x5=50? Did someone set the question wrongly?

I believe the computers still use some kind of secret score in the sorting program. But don't quote me on that.

Depends on the child's curiousity and readiness to learn.

Of course! And I'm sure you have read enough about a child's curiosity and learning readiness is only limited by the norms.

Exactly!

Some children may not be at that level to understand this point, but some may be.

Teachers should be ready to explain to students what numbers do H and S represent. There are not whole numbers, but their squares are.

Surely all teachers can do that.

that's why 因材施教 mah

u think the program's good?

We considering. It is more of enriching. And Y is very curious over it.

But then Sir Ken Robinson says “Curiosity is the engine of achievement.” Maybe it's us adults who are the problem, placing limits on them?

She knows!

I'm interested to know too. Thanks in advance Shirley :)

Already posted in comments. Scroll down.

Agreed !

Exactly ! There is no need to know the individual value yet you can get the answer!

You got it wrong. Square is not 2. Square is square root 2. And heart is square root 50.