iMath | Community

Huang Meizhe

Asked 9 years ago

Hi , thanks for add me in this group!

Replies 0

Jia Ying Sin

Asked 9 years ago

SG Primary 5 Number and Algebra

Is this the correct method??? Tx in advance!!!

Replies 6

Lucie Ng

Yes, both yr methods & answers are correct (Y)

6 years ago

Jia Ying Sin

6 years ago

Jason Oon

(a) is correct. However I find your working for (b) is not logical. Since 1 unit = $32.30 (i.e. 1 shirt), Therefore 3 units = $96.90

6 years ago

Soo Vei Li

The solution for (b) is incorrect because you took $150 as the total cost instead of $129.20. The 3 shirts should cost $96.90 because as you have calculated, each shirt = 1 unit, which is $32.30.

6 years ago

Julia Tan

may i know which level is this ques from? thanks

6 years ago

Jia Ying Sin

6 years ago

Ginz Toh

Asked 9 years ago

SG Primary 3 Number and Algebra

P3 question. Please help solve, thanks!

Replies 7

Karen Chan

Ans is 5

6 years ago

Ginz Toh

Thanks Karen, do you have the working?

6 years ago

Caleb Tey

6 years ago

William Huang

6 years ago

Tay Lip Seng

The concept is that the difference is always the same. Using model. Before: Jimmy - 4 parts Nephew - 1 part Difference is 3 parts. After (10 yrs time): Jim - 2 parts Nephew - 1 part Difference is 1 part. It is equal to 3 parts from "before". So the model can be modified to Jim - 6 parts Nephew - 3 parts. For "before", nephew got 1 part. For "aftere", nephew got 3 parts. Difference is 2 parts. These 2 parts is equal to 10 years. So 1 part is 5 years. Nephew is 5 years old. Hope it is not confusing. :)

6 years ago