Q&A - P3 Math

[atutor2001]

bookwormkids:

Hi atutor2001! Thanks for your help!

You are most welcome. I find it easier to draw backwards from comparison model with \"complete unit\" then starting with \"difference\".

[Alex001]

Sorry, I originally written an item that was not related to the question. I apologize for this message.

[usaik]

Hi,

The following question is from one of the top school past year paper for P4. I need help on the way how working can be worked out for the question. Many thanks in advance please.

The answer provided is \"C\"

http://postimage.org/image/1p1t773s4/

[tianzhu]

usaik:

Hi,

The following question is from one of the top school past year paper for P4. I need help on the way how working can be worked out for the question. Many thanks in advance please.

The answer provided is \"C\"

http://postimage.org/image/1p1t773s4/

Hi usaik

Good Morning.

Look at the pattern; the multiples of 3(even) like 6, 12, 18 appear in Row A.

The multiples of 3 (odd) like 3, 6, 9 ….. appear in Row C.

The nearest multiple of 3 to the number 100 is 99. It is odd,therefore,should be in Row C.

The number 100 appears to the right of 99 which is in Row C.

Hence , the given answer is correct.

Best wishes

[plum-cake]

KSP:

P3 Maths question.


x + y = 500
x - y = 300

Find x and y.

How to explain the whole process of solving this to a P3? Thanks.

Can't we do like this
x + Y = 500 --------statement 1
x - y = 300 --------Statement 2

then statement 1 - statement 2
that is
(x - x) (y - -y) = (500 -300)

so x will get cut off and y will become 2ys ( minus minus will be plus) = 200
that is 2y = 200
y = 100

now according to statement1
x + 100 = 500
x = 500- 100
= 400

same Question came in the P2 paper but for the x,y they put star and moon pictures. with the help of another mommy I tried to explain with the bar. but my daughter couldn't understand but with the above method she got something...

my question is Is it wrong?

[usaik]

tianzhu:

usaik:

Hi,

The following question is from one of the top school past year paper for P4. I need help on the way how working can be worked out for the question. Many thanks in advance please.

The answer provided is \"C\"

http://postimage.org/image/1p1t773s4/

Hi usaik

Good Morning.

Look at the pattern; the multiples of 3(even) like 6, 12, 18 appear in Row A.

The multiples of 3 (odd) like 3, 6, 9 ….. appear in Row C.

The nearest multiple of 3 to the number 100 is 99. It is odd,therefore,should be in Row C.

The number 100 appears to the right of 99 which is in Row C.

Hence , the given answer is correct.

Best wishes

Hi Tianzhu,
Thank you so much! Hope you have a good evening...

[concerned1970]

Can someone pls help to solve this ques? TIA

(I dunno how to use "Chicken and Rabbit method" on this pb sum.) I guessed the ans is 120 adults.

Adult: $5 Children: $2

There were twice as many children as adults at the concert. The total amt of money collected was $1080. How many adults were there at the concert?

[small]

concerned1970:

Can someone pls help to solve this ques? TIA

(I dunno how to use \"Chicken and Rabbit method\" on this pb sum.) I guessed the ans is 120 adults.

Adult: $5 Children: $2

There were twice as many children as adults at the concert. The total amt of money collected was $1080. How many adults were there at the concert?

Hi concerned1970,

Hope this helps and my solution may be the ideal one..


Given:
Children: $2 Adult: $5
The ratio of children to adults is 2 : 1
The price for 2 children and 1 adult is $9 (1 group)

Total amount of money collected / 9 ----> 1080 / 9 = 120 groups

This means there are 240 children and 120 adults.

Ans : There were 120 adults at the concert.


Check back : 240 x 2 + 120 x 5 ---> 480 + 600 = 1080

[Muffins]

concerned1970:

Can someone pls help to solve this ques? TIA

(I dunno how to use \"Chicken and Rabbit method\" on this pb sum.) I guessed the ans is 120 adults.

Adult: $5 Children: $2

There were twice as many children as adults at the concert. The total amt of money collected was $1080. How many adults were there at the concert?

1 unit for adults: 5x
\" \" \" children: 2x

2x X 2 = 4x
4x + 5x = 9x
1080/9 = 120

[ttyh]

Hi

Sorry to bother you all with a simple problem. My xx brain not functioning too well today

Benny’s saving was 7 tomes as much as Muthu’s savings.
After spending $20, Benny had $25 more than Muthu. How much was Benny’s savings at first?