Vivian Ang
Asked 9 years ago

SG chevron_right Primary 6 chevron_right Number and Algebra

Help please.Thanks

Replies 2
Raymond Ng

6 years ago
Vivian Ang

Thanks Raymond Ng

6 years ago

Kalis Ho
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Anyone can help my son on this question? Thank you! Noel Chua

Replies 2
Chong Ji Lian

6 years ago
Kalis Ho

Thank u!

6 years ago

Caroline Lim
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

3:4 or 4:3 ? Pls help...TIA!

Replies 1
Yeo See Yeong

Math teachers, do we need working for this type of question? we kind of know that if distance is the same, the speed will be 3:4 (S:G) and time will be 3:4 (G:S).

6 years ago

Idy Tan
Asked 9 years ago

SG chevron_right Primary 4 chevron_right Number and Algebra

Hi, would appreciate your guidance to this P4 question:Joni had thrice as much money as Glen at first. They each spent $45 on a haversack bag. In the end, Joni had 8 times as much money left as Glen. How much more money did Joni have than Glen?Many thanks!

Replies 8
Zhong Shu Hao

Initial ratio= 3:1 = 21:7 Final ratio = 8:1 =16:2 Hence, 5 units --> $45 1 unit --> $9 Joni has 14 units more than Glen. 14 units --> $126.

6 years ago
Idy Tan

Wow, you are amazing! Thanks, Zhong Shu Hao! How I wish I have half your skills to solve these questions. Thanks once again!

6 years ago
Zhong Shu Hao

welcome! ☺

6 years ago
Idy Tan

Sorry, could you explain why the ratio is changed to 21:7 and 16:2 respectively? And how do we get 14 units?

6 years ago
Vera Koh

6 years ago
Vera Koh

If the difference is 14u, then we need to multiply the 'before' ratio of 3:1 with 7 to become 21:7 (difference 14u) and the 'after' ratio of 8:1 with 2 to become16:2 (difference 14u)

6 years ago
Zhong Shu Hao

yup

6 years ago
Idy Tan

Oh, I see. Thank you very much for your explanation, Vera Koh!

6 years ago

Alice Lieu
Asked 9 years ago

SG chevron_right Primary 5 chevron_right Number and Algebra

Appreciate your help with this P5 question:Alan bought some chocolates and gave half of it to Ben. Ben bought some sweets and gave half of it to Alan. Alan ate 12 sweets and Ben ate 18 chocolates. The ratio of Alan's sweets to chocolates became 1 : 7 and the ratio of Ben's sweets to chocolates become 1 : 4. How many sweets did Ben buy?

Replies 2
Vera Koh

6 years ago
Alice Lieu

Tks Vera.

6 years ago

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