Q&A - P5 Math

[MathIzzzFun]

blueymum:

Thanks so much.


Would it be possible to use model to solve? The teacher has asked the students to solve using the model approach.

Thanks once again.

Hi

yes.. as per the solution..

empty tin = big block
paint = 6 smaller blocks

First model - big block + 3 smaller blocks with 3 dotted blocks = 5 kg
2nd model - big block + 2 smaller blocks with 4 dotted blocks = 4 kg

cheers.

[Winx5015]

Hello,


Need help for the following questions.

Q1). In a basket, the ratio of the number of apples to the number of oranges to the number of pears is 2:6:7. Express the number of oranges as a fraction of the total number apples and pears in the basket.(Write the fraction in its simplest form)

Q2). Jim has some 50-cent and 20-cent coins. He has less than 65 50-cent coins and more 50-cents coins than 20-cent coins. The total value of the 50-cent coins and 20-cent coins that he has is $43.20. What is the least possible number of 50-cent coins that he has?

Thanks!

[corneyAmber]

Winx5015:

Hello,


Need help for the following questions.

Q1). In a basket, the ratio of the number of apples to the number of oranges to the number of pears is 2:6:7. Express the number of oranges as a fraction of the total number apples and pears in the basket.(Write the fraction in its simplest form)

Q2). Jim has some 50-cent and 20-cent coins. He has less than 65 50-cent coins and more 50-cents coins than 20-cent coins. The total value of the 50-cent coins and 20-cent coins that he has is $43.20. What is the least possible number of 50-cent coins that he has?

Thanks!

Q1: Fraction of apples+ pears = (2+7)/15 = 9/15
Fraction of oranges = 6/15
Oranges / apples+pears = (6/15) / (9/15) = 6/9 = 2/3

Q2: Guess and check:
$0.50______$0.20
64_______56
60_______66
62_______61

So least possible number of $0.50 is 62

[Muffins]

Winx5015:

Hello,


Need help for the following questions.

Q1). In a basket, the ratio of the number of apples to the number of oranges to the number of pears is 2:6:7. Express the number of oranges as a fraction of the total number apples and pears in the basket.(Write the fraction in its simplest form)

Q2). Jim has some 50-cent and 20-cent coins. He has less than 65 50-cent coins and more 50-cents coins than 20-cent coins. The total value of the 50-cent coins and 20-cent coins that he has is $43.20. What is the least possible number of 50-cent coins that he has?

Thanks!

Hi.

In your Question 1, your question is a little ambiguous. If you want it as a fraction of only the apples and pears, then the answer would be 6/13. If you want it as a fraction of all 3, then the answer is 2/5.

[Winx5015]

Hi ksi,


Thanks for solving my problems.

:thankyou:

[euniceloke]

Willy and Peter have $256. Willy spent 0.5 of his money on a shirt while Peter spent 0.4 of his money on a bag. The bag cost $8 more then the shirt. How much money did Willy have at first

[YumYum]

Hi, need help with the foll Qns:


Henry Park 2010, paper 2, Qn 12.

(Apologies, I am having some problem in uploading the picture)

Thanks

[YumYum]

Need help with 1 more Qn:


Mrs Lee knitted many scarves for sale. 3/5 of them were black scarves and the rest were white scarves. After selling 120 white scarves and 5/9 of the black scarves, she had 2/5 of the scarves left. How mant scarves did she sell in all?

Thanks

[MathIzzzFun]

YumYum:

Need help with 1 more Qn:


Mrs Lee knitted many scarves for sale. 3/5 of them were black scarves and the rest were white scarves. After selling 120 white scarves and 5/9 of the black scarves, she had 2/5 of the scarves left. How mant scarves did she sell in all?

Thanks

Hi

using units....

Total number of scarves = 15 units
black scarves = 9 units
white scarves = 6 units

so, 15 units = black sold + white sold + left
15 units = 5 units + 120 + 6 units
4 units = 120, 1 unit = 30
Sold = 5 units + 120 = 270

cheers.

[MathIzzzFun]

YumYum:

Hi, need help with the foll Qns:


Henry Park 2010, paper 2, Qn 12.

(Apologies, I am having some problem in uploading the picture)

Thanks

Hi

Total volume of water in tank A (before)
= Volume of water in Tank A (after) + Volume of water in tank B (after)
= height x (Base Area of A) + height x (Base area of B)

I think you can complete the solution from here..

cheers.