Ask Singapore Homework?

Upload a photo of a Singapore homework and someone will email you the solution for free.



Question

primary 5 | Maths
2 Answers Below

Anyone can contribute an answer, even non-tutors.

Answer This Question
Soni
Soni

primary 5 chevron_right Maths chevron_right Singapore

Solution please with clear explanation as possible . Thanks for your help

Date Posted: 3 days ago
Views: 22

See 2 Answers

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Felicia Goh
Felicia Goh's answer
5 answers (Tutor Details)
1st
General: Use algebra to solve

Part a: Represent your unknowns (in this case, amount of money Mrs Tay have and cost of 1kg of sugar) as constants (in this case, x and y respectively)

Using these constants, come up with 2 equations and solve them simultaneously i.e getting rid of 1 constant through cancelling out gives you the value of the other constant (in this case, x cancels each other out as shown in the green box, allowing u to calculate what y is)

Part b: The link from a to b is subbing value of y back into the equations obtained in part a. U can either substitue back into eqn 1 or eqn 2 as both will give u the same answer. In this case, I chose eqn 1. After substituition, I will get value of x as shown
Felicia Goh
Felicia Goh
3 days ago
Sorry, I forgot to draw the green box. The cancelling out of x is in the eqn1 + eqn2 line
Soni
Soni
3 days ago
Thanks for the help but can you give me the solution but not in algebraic method .
done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
Felicia Goh
Felicia Goh's answer
5 answers (Tutor Details)
I used the model method this time round. Hope it helps!
Each box represents 1kg of sugar
The reason why part of the last block of the first row consists a 16 is coz Mrs Tay doesn't have enough money to buy all 6kg of sugar