Year 5 maths question. (1 Viewer)

[ParraEelz]

The number of Korean students in the school is 5/8 of the number of Chinese students. There are 540 MORE Chinese students. How many students are Korean?

Please do this question in a way that a year 5 student will understand. No algebra, unless it is defs required.
Thanks

 

[iJimmy]

thats not year 5 that like year 8

 

[ParraEelz]

bro just answer the question man, please

Yeah it's hard cause it's for selective exam preparation.

 

[iJimmy]

i got

900 korean
1440 chinese

korean / chinese = 900 / 1440 = 5 / 8

 

[Menomaths]

You can do trial and error maybe...Otherwise
Let Chinese = x

 

[iJimmy]

menomaths how do you type like that, is it a programme or what, ?

 

[Menomaths]

Click on 'reply with quote' and you'll see what I typed to end up with that. At first it may seem intimidating but it really isn't. If you want free lessons head over to the 4U marathon where they're all using LaTeX and just click reply with quote to learn.

 

[iJimmy]

so imagine number of chinese srudents as C
and number of Korean students as K
5/8C = K
and K + 540 = C
so that means that 3/8C = 540
so 540 /3
equals whatever
and times by 5
equals number of Korean students

 

[D94]

You have to do this pictorially.

Chinese: [*] [*] [*] [*] [*] [*] [*] [*]
Korean.: [*] [*] [*] [*] [*]

So it is clear that the number of Korean students is 5/8 of the Chinese students.

The next part says there are 540 more Chinese students than Korean students, so looking at the picture, 3 'parts' must equal that extra 540 students. So each part is 180 students.

So multiplying 5 parts by 180 students per part = 900 students.

 

[iJimmy]

You have to do this pictorially.

Chinese: [*] [*] [*] [*] [*] [*] [*] [*]
Korean.: [*] [*] [*] [*] [*]

So it is clear that the number of Korean students is 5/8 of the Chinese students.

The next part says there are 540 more Chinese students than Korean students, so looking at the picture, 3 'parts' must equal that extra 540 students. So each part is 180 students.

So multiplying 5 parts by 180 students per part = 900 students.

you should be a teacher

 

[HAX0R]

That's a year 5 question (advanced). I'm in year 7 so my ways of approaching it may be different.

We need to set up an equation. So we know that the amount of Korean students is 5/8 of the Chinese students. This is equivalent to 540.
Let the amount of Chinese students be "c".
5/8c=c-540 (5 eights of the Chinese students is equal to the amount of Chinese students - 540, the difference)
Now simple equation solving.
Move the c across and the -540 across and you get: c-5/8c=540
8/8c-5/8c=3/8c
So 3/8c is equal to 540
Multiply both sides by 8.
3c=4320
Divide both sides by 3.
c=1440

There are 1440 Chinese students and 900 (1440-540) Korean students.

 

[Makematics]

you should be a teacher

The irony

 

[JT145]

Answer: Eastwood