Q&A - PSLE Math

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Hi Keinic,


You are welcome.

[beanbear]

Hi Can someone provide a model method for the following problem sum. I also have a question regarding the interpretation of certain words in the question.


4 children shared a box of chocolate bars. The first child took 1/2 of the total bars of chocolate and 1/2 of a chocolate bar. The second child took 1/2 of the remaining bars and 1/2 of a chocolate bar. The third child took 1/2 of the remaining bars and 1/2 of a chocolate bar. The fourth child took the remaining 7 bars.
(A) How many bars of chocolate were there? Ans key: 63
(B) How many bars of chocolate did the third child get? Ans key: 8

As I was working through, I was wondering about what to do with the 1/2 chocolate bar after the 1st child. Does the remaining 1/2 chocolate bar go to the remaining amount? Do you interpret \"the remaining bars\" as \"whole bars\" only or include the half choc bar?

[match3frog]

Hi mathizzzfun and yomamas, thank you for the solutions! Have a nice day

[tianzhu]

Hi


Use \"Work backwards\"

Hope this helps.

Best wishes

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[Michaelia0816]

Hello everyone! I need help, I am not sure of this question. I need step by step answer!

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A shopkeeper had two DVD players of the same model. He sold one of them at 40% more than the usual price and the other at 10% less than the usual price. He received a total of $330. What was the usual price of each DVD player?

[Michaelia0816]

The answer sheet said it was $150. Was it right?

[Michaelia0816]

Sorry as my teacher printed the question with the final answer beside it so I don know the statements and method!!!

[tianzhu]

Michaelia0816:

The answer sheet said it was $150. Was it right?

Hi

If answer is given as 150

150*0.9 ----- 135
150*1.4 ----- 210

Total sum ----- 345 and not 330.

If it is \"20% less than the usual price\", then 150 is correct.

Please check with your teacher.

Best wishes

[Michaelia0816]

Thank Tianzhu!

[Michaelia0816]

Again Tianzhu, another question.

4. Jason left Town A for Town B. After travelling 5/8 of the distance, he passed Mary who was travelling in the same direction at a constant speed of 50km/h. It took Jason 2 hours to complete the remaining journey. When Jason reached Town B, Mary was still 80km away from Town B.
A) What is the distance between Town A and Town B?
B) What was Jason’s average speed?