Q&A - PSLE Math

[Yu Xuan]

hashroop:

Pls help:

John has a number of 10-cents coins and Mary has a number of 50-cents coins. John has 6 more coins than Mary but Mary has $9.00 more than John. How much does John has?

Number of coins;
Mary --> 1 unit
John --> 1 unit + 6

Amount;
Mary --> 1 unit * 50 = 50 units
John --> 10 units + 60

Since Mary has 900cents more than John;
50units - 10units - 60 => 900
40units => 900 + 60 = 960
1unit => 960 / 40 = 24

John;
10 * 24 + 60 = 300cents = $3.00

[sydney]

Sorry, I’m new here. Was surfing these forum and trying to contribute :-). And came across this question. After reading it, I have one question. Can you tell me why divide by 40?


i.e the step 960/40.

[MegRay]

Hi,


I am new here. Hope someone out there can help me with this Algebra question. Thank you in advance.

Mary had 42 goats. There were 5x more males than females.
a) How many male goats had she in term of x?

[littlecloud]

Hi,

Need help with this Maths question - please solve using model.
Jack and Jill has some sweets. If Jack gives Jill 41 sweets, they will have the same number of sweets. If Jill gives Jack 41 sweets, Jack’s sweets will be twice as many as Jill’s sweets. How many sweets do they have?
Thanks in advance.

[tianzhu]

Brenda10:

Hi Tianzhu

Thanking for your great effort to present it in such a nice picture.

Hi Brenda 10

Good Morning.

You’re welcome. I am glad you liked it.

新年快乐
学业进步

May you be blessed with a successful PSLE 2011.

Best wishes

[small]

Hi littlecloud,


Please find the solution, cheers.

http://farm6.static.flickr.com/5258/5429510680_c2d02eccee_z.jpg\">


Good morning Tianzhu。。。新年快乐，万事如意。。。。


:celebrate:

[Yu Xuan]

sydney:

Sorry, I'm new here. Was surfing these forum and trying to contribute :-). And came across this question. After reading it, I have one question. Can you tell me why divide by 40?


i.e the step 960/40.

Since 40 units denotes 960, to find 1 unit, we use 960 divided by 40.

Yu Xuan

[tianzhu]

small:

Good morning Tianzhu。。。新年快乐，万事如意。。。。
:celebrate:

Hi small

Good Morning

恭喜发财，招财进宝

Best wishes

[stary]

Hi Tianzhu,


Impressed by yr precise solutions with models. I have a question, see if u could help.

Dennis had 80 more stickers than Karen. Dennis gave 25% of his stickers to Karen. Karen in return gave 60% of her stickers to Dennis. In the end, Dennis had 92 stickers more than Karen. How many stickers did Dennis have at first?

Stary

[stary]

Hi all,

I have a question in doubts, need some assistance. Tks u:)

20% of John’s savings is $120 more than 30% of Brian’s savings. After John spent 5/6 of his savings and Brian spent 1/2 of his savings. John has $20 more than Brian. Find John’s savings at first.