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I dont understand the working

Can u understand the model?

This is the key....

if u cannot understand the model, then....

This is the key....

if u cannot understand the model, then....

I cannot understand the model. Any other methods?

Can you understand the yellow parts - 2/5?

No

how many columns in the model?

5

Ok i understand. Thanks

Good

Similar question shared for you to hv further practice on this type of questions

Similar question shared for you to hv further practice on this type of questions

Thanks a lot

This type of Qns will be tested in PSLE for sure.

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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

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

Date Posted:
2 months ago