P2 Math - General Discussion

[Jcong]

Marie, Jonathan and David shared a sum of money. The total amount of money received by Jonathan was 2/3 the amount ofmoney received by David. Marie received twice as much as what Jonathan and David received. After Marie had given $48 to Jonathan and $27 to David, Jonathan gave $3 to David. In the end, 3 of them had the same amount of money. Find the difference between the amount of money that Marie and Jonathan had at first.

[corneyAmber]

Jcong:

There are 9 stacks of chairs in the hall. There are 12 chairs in each stack. Mohan places eac chair equally spaced apart to form the perimeter of a rectangle. If the number of chairs placd along its length is thrice the numbr of chairs palced along its breadth, how many chairs are placed along one of the length of the rectangle?

Breadth = u
Length = 3u

2(B+L) = 108+4 = 112 (4 corners chairs duplicate)

2(u+3u) = 112
8u = 112
u = 14

3u = 14 * 3 = 42

Length = 42

Check:
Chairs on both lengths = 42+42 = 84
Chairs on both breaths = 14+ 14 = 28
But at the corners, they would have a common chair in each corner, so we can substract a chair from each corner, giving breadth = 12+12 = 24

Hence total number of chairs to form the rectangle = 84=24 = 108

[jieheng]

Jcong:

Pls help me


Jovi had 2 strings, string A and string B.Initially, string A was thrice the length of string B. Jovi then cut 9.1m from string A and 140 cm from string B. The length of string B became 1.5 times of string A. What was the length of string A at first? Express your answer in centimeters.

Hi ,

Answer is on page 341 .

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=6373&start=3400

[jieheng]

Jcong:

Jcong:

Mrs Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun cost $10 less than a teddy bear. The total cost of toy guns was $490 more than the cost of teddy bears.


(a) How much did Mrs Tan spend on the teddy bears?

(b) How much did one teddy bear cost?

Hi ,

Answer is on page 339 .

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?t=6373&start=3380

[jieheng]

Jcong:

Marie, Jonathan and David shared a sum of money. The total amount of money received by Jonathan was 2/3 the amount ofmoney received by David. Marie received twice as much as what Jonathan and David received. After Marie had given $48 to Jonathan and $27 to David, Jonathan gave $3 to David. In the end, 3 of them had the same amount of money. Find the difference between the amount of money that Marie and Jonathan had at first.

At first
J [-][-] (2u)

D[-][-][-] (3u)

M[-][-][-][-][-][-][-][-][-][-] (10u)



J [-][-] (2u) + 48 - 3

D[-][-][-] (3u) + 27 + 3

M[-][-][-][-][-][-][-][-][-][-] (10u) - 48 - 27

3u + 27 + 3 -----> 2u + 48 - 3

1u -----> 15

Difference between the amount of money that Marie and Jonathan had at first = 8u = 8 * 15 = $ 120 (Ans)

[somaschool]

Anna Ng:

my friend asked me this P2 Math question, can somebody help? the answer is 73, but how to get 73?

http://postimage.org/image/2qhptxcec/

The rule to the logic is adding up the digits on each side. The total is 45, e.g. for the top row 8+7+5+0+6+4+9+1+3+2 = 45. Same in the other directions. So, the ? digits should add to 10. The answer can be 91, 82, 73, ...., 37, 28, 19.

[J.029523SEMBAWANG]

Hi, I have the following number pattern question which I could not figure out.

Not sure if the question was wrong …

999, 989, ____, 929, 889

Pls help me. Thank you in advance.

[aneez]

Jcong:

Mrs Tan bought 4 times as many toy guns as teddy bears. She spent $1750 altogether. A toy gun cost $10 less than a teddy bear. The total cost of toy guns was $490 more than the cost of teddy bears.


(a) How much did Mrs Tan spend on the teddy bears?

(b) How much did one teddy bear cost?

Ermmm.. are you sure this is P1 or P2 paper? P1 only deals with number to 100 and P2 is until 1000. very higher order qn. Suitable for a P3 pupil.

[lizuan76]

Hi parents of P1,


How are your child copying in math P1? Last night my girl told me she can't finish her math task and she is the last one to submit the paper. Hai so stress even in P1 nowadays.

Is it time to send her for math class? :idea:

[Callie Tan]

lizuan76:

Hi parents of P1,


How are your child copying in math P1? Last night my girl told me she can't finish her math task and she is the last one to submit the paper. Hai so stress even in P1 nowadays.

Is it time to send her for math class? :idea:

My girl is in P1. Her maths quite ok... yes she did tell me sometimes she was unable to complete her maths in class but most of the time, she got not much problem.

My girl is attending an maths enrichment class now. I am sending her because I want her to be more exposed to different teachings and different levels of Maths concepts and foundations...compared to just the school curriculum. Most enrichment centres cover more areas/topics faster than the schoool and drill the kids with slightly tougher questions too... If this is what you are looking for, then it might be time to keep a look out for a suitable maths class... just my 2 cents worth.