Q&A - PSLE Math

[2632parent]

Kindly help me with this question


1) Gerald had 60 sweets more than Herlina. After eating half of what they had, the ratio of the number of Gerald’s sweets to the number of Herlina’s sweets became 3:2.
a) How many sweets did Gerald eat?
b) Gerald gave Herlina some sweets and the ratio became 8:7. How many sweets did Gerald give Herlina?

Thank you

[superksmum]

Oldschool:

superksmum:

[quote=\"superksmum\"]Hi, can someone please help:


Mrs Tan had 130 apples and oranges. After she sold 2/3 of the apples and 2/5 of the oranges, she had 36 more apples than oranges left. How many fruits had she left in all?

Can someone please help.
Thank you.

Hi,

You might want to double check on the numbers and fractions.

http://i39.tinypic.com/30bpbwk.jpg\">

Regards[/quote]Thank you.

[superksmum]

Oldschool:

superksmum:

[quote=\"superksmum\"]Hi, can someone please help:


Mrs Tan had 130 apples and oranges. After she sold 2/3 of the apples and 2/5 of the oranges, she had 36 more apples than oranges left. How many fruits had she left in all?

Can someone please help.
Thank you.

Hi,

You might want to double check on the numbers and fractions.

http://i39.tinypic.com/30bpbwk.jpg\">

Regards[/quote]Hi Oldschool,
It should be 36 more oranges than apples.

Thank you.

[speedmaths.012624com]

superksmum:

Hi, can someone please help:


Mrs Tan had 130 apples and oranges. After she sold 2/3 of the apples and 2/5 of the oranges, she had 36 more oranges than apples left. How many fruits had she left in all?

Hi superksmum, and all mummies out there,

Happy Mother's Day!

=

One possible method, copied from the book \"Advanced Model Method\" which you can browse through at any Popular Book store.

Look at the Denominators, 3 and 5.
The Denominators are your friends.
P6 pupils need all the friends they can get.

Let there be 3 Bags of apples.
Let there be 5 Boxes of oranges.

3 Bags + 5 Boxes = 130 fruits (apples/oranges)
(Mrs Tan had 130 apples and oranges)

She sold 2 Bags of apples.
She sold 2 Boxes of oranges.

She had 1 Bag of apples left.
She had 3 Boxes of oranges left.

1 Bag = 3 Boxes - 36 fruits
(she had 36 more oranges than apples left)

3 Bags + 5 Boxes = 130 fruits (apples/oranges)
3 Bags = 130 fruits - 5 Boxes ........... (Row 1)

1 Bag = 3 Boxes - 36 fruits
(x 3)
3 Bags = 9 Boxes - 108 fruits .............(Row 2)

Row 2 = Row 1
3 Bags = 3 Bags

3 Bags = 9 Boxes - 108 fruits = 3 Bags = 130 fruits - 5 Boxes

9 Boxes - 108 fruits = 130 fruits - 5 Boxes

14 Boxes - 108 fruits = 130 fruits

14 Boxes = 238 fruits

1 Box = 17 fruits

5 Boxes = 85 fruits (oranges)

Can you work from here?

Cheers

speedmaths


.

[superksmum]

Hi speedmaths,


Thank you. We will try to work on it.

Cheers!

[Pokemonblack]

In Math, there is more than one method to solve a question. How does one know which method to use?

[Oldschool]

superksmum:

Mrs Tan had 130 apples and oranges. After she sold 2/3 of the apples and 2/5 of the oranges, she had 36 more oranges than apples left. How many fruits had she left in all?

[/quote]




Hi,

Thanks for the clarification.

In case you still need the MD approach,

http://i42.tinypic.com/6ruh4z.jpg\">

Regards

[david59]

2632parent:

Kindly help me with this question


1) Gerald had 60 sweets more than Herlina. After eating half of what they had, the ratio of the number of Gerald's sweets to the number of Herlina's sweets became 3:2.
a) How many sweets did Gerald eat?
b) Gerald gave Herlina some sweets and the ratio became 8:7. How many sweets did Gerald give Herlina?

Thank you

Sorry, I cannot draw the model here.
Make Gerald 2 units plus 60 n Herlina just 2 units in ur model.
Since both ate half their sweets, so remove 1 unit n 30 sweets from Gerald n 1 unit from Herlina. Therefore Gerald now had 1 unit plus 30 sweets while Herlina had 1 unit left.
Now their ratio had become 3:2. Therefore Herlina's 1 unit is equal to 2 parts. Gerald's 1 unit plus 30 is equal to 2 parts plus another 1 part which is 30 sweets. Therefore every part is equal to 30 sweets.
The rest you can work on it, I sure.

[MathIzzzFun]

2632parent:

Kindly help me with this question


1) Gerald had 60 sweets more than Herlina. After eating half of what they had, the ratio of the number of Gerald's sweets to the number of Herlina's sweets became 3:2.
a) How many sweets did Gerald eat?
b) Gerald gave Herlina some sweets and the ratio became 8:7. How many sweets did Gerald give Herlina?

Thank you

After both ate half their sweets, Gerald's sweets : Herlina's sweets --> 3u : 2u
At first, Gerald's sweets : Herlina's sweets --> 6u : 4u
Gerald had 60 sweets more than Herlina,
2u --> 60
1u --> 30

after eating half of their sweets,
Gerald's sweets --> 3 x 30 = 90
Herlina's sweets --> 2 x 30 = 60
Total --> 150

After giving Herlina some sweets,
Gerald's sweets --> 8/15 x 150 = 80

Number of sweets given to Herlina --> 90 - 80 = 10

cheers.

[2632parent]

:thankyou: Thank you both david59 and MathIzzzFun for your reply. Is my dd homework and he very thankful to both of you. :thankyou: