## Q&A - PSLE Math

### Re: Q&A - PSLE Math

Need help with explanation, Tks

1) Polly had 360 dolls more than Ariel at first. After Polly gave away 1/4 of her dolls and Ariel gave away 2/3 of her dolls, they had 764 dolls altogether. How many dolls did they give away altogether?

2) Jon, Molly and Chris shared some sweets. The ratio of the total number of sweets received by Jon and Molly to the number of sweets received by Chris was 2:5. When Chris gave 25 sweets to Jon and 31 sweets to Molly, and Jon gave 12 sweets to Molly, each of them had the same number of sweets. Find the total number of sweets Jon had at first.

1) Polly had 360 dolls more than Ariel at first. After Polly gave away 1/4 of her dolls and Ariel gave away 2/3 of her dolls, they had 764 dolls altogether. How many dolls did they give away altogether?

2) Jon, Molly and Chris shared some sweets. The ratio of the total number of sweets received by Jon and Molly to the number of sweets received by Chris was 2:5. When Chris gave 25 sweets to Jon and 31 sweets to Molly, and Jon gave 12 sweets to Molly, each of them had the same number of sweets. Find the total number of sweets Jon had at first.

### Re: Q&A - PSLE Math

Let Ariel = 12uwaterfall wrote:Need help with explanation, Tks

1) Polly had 360 dolls more than Ariel at first. After Polly gave away 1/4 of her dolls and Ariel gave away 2/3 of her dolls, they had 764 dolls altogether. How many dolls did they give away altogether?

Polly=12u+360

After Poly gave 1/4, left 3/4 = 9u+270

After Ariel gave 2/3, left 1/3 = 4u

9u+270+4u = 764

13u+270=764

13u=494

u = 38

At 1st, Polly had = 12u+360 = 816

Polly gave away = 816/4= 204

At 1st Ariel had = 12u = 456

Ariel gave away (2/3)X456 = 304

Altogether they gave away 204+304= 508

This question has been answered before, various solutions here,2) Jon, Molly and Chris shared some sweets. The ratio of the total number of sweets received by Jon and Molly to the number of sweets received by Chris was 2:5. When Chris gave 25 sweets to Jon and 31 sweets to Molly, and Jon gave 12 sweets to Molly, each of them had the same number of sweets. Find the total number of sweets Jon had at first.

http://www.kiasuparents.com/kiasu/forum ... 5#p1460005

http://www.kiasuparents.com/kiasu/forum ... 6#p1460276

http://www.kiasuparents.com/kiasu/forum ... 1#p1460941

### Re: Q&A - PSLE Math

Ender wrote:Let Ariel = 12uwaterfall wrote:Need help with explanation, Tks

1) Polly had 360 dolls more than Ariel at first. After Polly gave away 1/4 of her dolls and Ariel gave away 2/3 of her dolls, they had 764 dolls altogether. How many dolls did they give away altogether?

Polly=12u+360

After Poly gave 1/4, left 3/4 = 9u+270

After Ariel gave 2/3, left 1/3 = 4u

9u+270+4u = 764

13u+270=764

13u=494

u = 38

At 1st, Polly had = 12u+360 = 816

Polly gave away = 816/4= 204

At 1st Ariel had = 12u = 456

Ariel gave away (2/3)X456 = 304

Altogether they gave away 204+304= 508

This question has been answered before, various solutions here,2) Jon, Molly and Chris shared some sweets. The ratio of the total number of sweets received by Jon and Molly to the number of sweets received by Chris was 2:5. When Chris gave 25 sweets to Jon and 31 sweets to Molly, and Jon gave 12 sweets to Molly, each of them had the same number of sweets. Find the total number of sweets Jon had at first.

http://www.kiasuparents.com/kiasu/forum ... 5#p1460005

http://www.kiasuparents.com/kiasu/forum ... 6#p1460276

http://www.kiasuparents.com/kiasu/forum ... 1#p1460941

tks!

- alfretztay
- KiasuGrandMaster
**Posts:**1199**Joined:**Sun Sep 12,**Total Likes:**5

### Re: Q&A - PSLE Math

(a)Dragon Flame wrote:Pls help. Tks !

Dragon Flame wrote:

Please help. Thank u

**:**

*D***:**

*E*

*Total*21u : 8u + 7 : 500

– 9u – 7

---------- --------

12u(3) : 8u(2)

21u + 8u + 7 -> 500

29u -> 493

1u -> 17

21u -> 357

(b) 12u -> 204

204 x 0.20 -> 40.80

Ans : (a) 357 coins; (b) $40.80.

### Re: Q&A - PSLE Math

Please can someone solve this question with explanation not using algebra?

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

### Re: Q&A - PSLE Math

Q1. At8:30am, a motorcycle left town A for Town B travelling at 60km/h. 1 1/2 hour later, a car left town A travelling at 85km/h. The car overtook the motocycle midway between Town A and Town B, and reached Town B first.

B)What was the distance between town A & Town B?

Thanks !

B)What was the distance between town A & Town B?

Thanks !

### Re: Q&A - PSLE Math

belnanna wrote:Please can someone solve this question with explanation not using algebra?

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

Last edited by SAHMom on Sun Feb 22, 2015 7:51 pm, edited 1 time in total.

### Re: Q&A - PSLE Math

Hi belnannabelnanna wrote:Please can someone solve this question with explanation not using algebra?

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

Good Evening.

The MD may be useful to your child.

I’ve drawn more MD than necessary; students may consolidate when they become more familiar.

5u ----- 25

1u ----- 5

9u ----- 45

I’ll leave it to your child to carry on with the details.

Hope this helps.

Best wishes.

### Re: Q&A - PSLE Math

Thank you v much for the effort to draw out this explanation. Appreciated! Thanks so much SahMomSAHMom wrote:belnanna wrote:Please can someone solve this question with explanation not using algebra?

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

### Re: Q&A - PSLE Math

Thanks so so much Tianzhu for this post. Much appreciated for the effort. Understood now. Thanks again!tianzhu wrote:Hi belnanna

Would appreciate it.. Thanks so much in advance.

Nathan read 25 pages of a book in the morning.In the afternoon, he read 1/4 of the remaining pages of the book.He read the remaining 1/3 of the book at night. how many pages were there in the book?

Good Evening.

The MD may be useful to your child.

I’ve drawn more MD than necessary; students may consolidate when they become more familiar.

5u ----- 25

1u ----- 5

9u ----- 45

I’ll leave it to your child to carry on with the details.

Hope this helps.

Best wishes.