Q&A - PSLE Math

[BeContented]

MathIzzFun:

Hi

You are welcome

This is an \"if\" question ie the counters are not changed at all. So, the answer is for the number of counters in the box \"initially\" ie if the counters were not changed.

cheers.

Oh yah Talk about telling my son to read carefully Thanks again.

[chrisu]

Another P6 question and I wonder if the question is correct;


Mr. Wong had 207 apples and oranges. After he had sold 50% of the apples and 40% of the oranges, he had 45 more oranges than apples left. How many fruits did he have left?

Thank you.

[shurley197323]

Pls help. John had 993 tables and chairs at first.

After he sold 2/5 of the tables and 5/8 of the chairs, he had 459 tables and chairs left.
How many tables did he sell?

[tianzhu]

chrisu:

Another P6 question and I wonder if the question is correct;

Mr. Wong had 207 apples and oranges. After he had sold 50% of the apples and 40% of the oranges, he had 45 more oranges than apples left. How many fruits did he have left?
Thank you.

Hi

I guess you just want to confirm the answers.

I did a quick check, and the answers are 81 oranges and 36 apples giving a total of 117 fruits.

Best wishes

[greenfinger]

a)Each of the three cards is printed with a different whole number.The smallest number is 25.Two cards are drawn at a time and the numbers on the cards are added together.The sums are 56,68 and 74


What is the largest number on the cards? :?


PLs anyone guide me ,thank you

[Hifive]

Hi


Need help with this question:

http://www.flickr.com/photos/62186744@N04/5679456052/in/photostream/

This is from thinkingMath@onSponge P6 book. Don't quite understand the solution provided on the back of the book. Would like to seek help if there's another method to solve this question. Thanks in advance.

[corneyAmber]

greenfinger:

a)Each of the three cards is printed with a different whole number.The smallest number is 25.Two cards are drawn at a time and the numbers on the cards are added together.The sums are 56,68 and 74


What is the largest number on the cards? :?


PLs anyone guide me ,thank you

My logic as follows:

56 is the smallest added number, hence 25 should be part of 56.

So 56-25 = 31 is the next card.

The last card would be 68-25 = 43 (since 68-31 = 19 <25)

Test it on 74-43 = 31

So the 3 cards are: 25, 31 and 43.

Btw, what level is this question?

[corneyAmber]

offtopic here greenfinger… I see that your nick is greenfingers…are you very good in keeping a garden?

[MathIzzFun]

Hifive:

Hi


Need help with this question:

http://www.flickr.com/photos/62186744@N04/5679456052/in/photostream/

This is from thinkingMath@onSponge P6 book. Don't quite understand the solution provided on the back of the book. Would like to seek help if there's another method to solve this question. Thanks in advance.

Hi

Hope this helps :lol:

http://www.flickr.com/photos/62167097@N02/5679183503/in/photostream

cheers.

[tianzhu]

shurley197323:

Pls help. John had 993 tables and chairs at first.

After he sold 2/5 of the tables and 5/8 of the chairs, he had 459 tables and chairs left.
How many tables did he sell?

Hi

This question touches on simultaneous concepts.

If a student is familiar with SE, he/she may use it.
If not, he/she may solve the two equations pictorially or use the “Alphabet Method”

Tables sold ------ TT
Tables left ------ TTT

Chairs sold ------ CCCCC
Chairs left ------ CCC

TTT + CCC ------- 459, hence T+C ------- 153

TT + CCCCC ----- 534 (993 – 459), therefore C -------- 76

T ------- 153 – 76 ------ 77

Tables sold ------- 2*77 ------- 154.

Best wishes