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primary 6 | Maths | Geometry
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Emily
Emily

primary 6 chevron_right Maths chevron_right Geometry chevron_right Singapore

Can help?

Date Posted: 2 months ago
Views: 89

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sstrike
Sstrike's answer
3332 answers (A Helpful Person)
1st
Emily
Emily
2 months ago
I dont understand the working
sstrike
Sstrike
2 months ago
Can u understand the model?
This is the key....

if u cannot understand the model, then....
Emily
Emily
2 months ago
I cannot understand the model. Any other methods?
sstrike
Sstrike
2 months ago
Can you understand the yellow parts - 2/5?
Emily
Emily
2 months ago
No
sstrike
Sstrike
2 months ago
how many columns in the model?
Emily
Emily
2 months ago
5
Emily
Emily
2 months ago
Ok i understand. Thanks
sstrike
Sstrike
2 months ago
Good

Similar question shared for you to hv further practice on this type of questions
Emily
Emily
2 months ago
Thanks a lot
sstrike
Sstrike
2 months ago
Welm. Pls hv the intensive revison of this type of Qns if it is possible.

This type of Qns will be tested in PSLE for sure.
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sstrike
Sstrike's answer
3332 answers (A Helpful Person)
Alternative → ratio method
Y : T = 1 : 5 = 8 : 40
B : T = 1 : 4 = 10 : 40
B : G = 2 : 1 = 10 : 5
R = T-Y-B-G = 40-8-10-5 = 17
R:T = 17 : 40 = 85 : 200
Ans: 200cm²


Alternative → fraction method
1 - ⅕ - ¼ - ½×¼
= 40⁄40 - 8⁄40 - 10⁄40 - 5⁄40
= 17⁄40
= 85⁄200
Ans: 200cm²
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sstrike
Sstrike's answer
3332 answers (A Helpful Person)