Q&A - P4 Math

[tianzhu]

thmejlfm:

Hi! Thanks for solving. I am very blurred. Not very good in model. May I know why used two boxes?


Actually, my DD solved the first part. But, all the adult kept asking her why 5 units? Said that she cannot use this matter.

As for the other question, how to use 4 x 4 when the question asked rectangle? It will become a square, right?

Hi

For the first question,your DD is right to use 5 units.

As for the second question, a square is a special rectangle.

http://www.mathwarehouse.com/geometry/quadrilaterals/parallelograms/is_square_rectangle.php
http://mathcentral.uregina.ca/QQ/database/QQ.09.07/h/odette1.html

Best wishes

http://farm7.static.flickr.com/6170/6149246206_047cc41c84_z.jpg\">

[janicelhl]

MathIzzzFun:

janicelhl:

Hi sorry,

I am slow. For Q2, I don't understand. why is length 3u of breath?

Hi

http://i52.tinypic.com/2vj2bt0.jpg\">

cheers.

Thank you very much!!!

[bookwormkids]

Hi MathIzzzFun! Thanks for your explanation.

bookwormkids:

Q2. length = 3 x breadth... with this, I think you can solve it

For each rectangle, breadth = 1u, length = 3u, perimeter of figure = 2 x (3u+3u+1u) = 14u = 28cm. So, 1u = 2cm

Area of figure = 3u x 4u = 6cm x 8 cm = 48 cm2



cheers.

[MathIzzzFun]

janicelhl:

MathIzzzFun:

[quote=\"janicelhl\"]
Hi sorry,

I am slow. For Q2, I don't understand. why is length 3u of breath?

Hi

http://i52.tinypic.com/2vj2bt0.jpg\">

cheers.

Thank you very much!!![/quote]u r welcome

cheers.

[MathIzzzFun]

bookwormkids:

Hi MathIzzzFun! Thanks for your explanation.

bookwormkids:

Q2. length = 3 x breadth... with this, I think you can solve it

For each rectangle, breadth = 1u, length = 3u, perimeter of figure = 2 x (3u+3u+1u) = 14u = 28cm. So, 1u = 2cm

Area of figure = 3u x 4u = 6cm x 8 cm = 48 cm2



cheers.

u r welcome

cheers.

[chokos]

Hi all:


Need help on following qn:
Jessica had $300 more than Pamela.
After Pamela spent $60, the amount of money she had left was 1/6 of
the amount of money Jessica had. How much money had Pamela at first?
(Ans: $132)

[sakurachan]

Hi Chokos,


You can try seeing the qn in this way.

At first, Pamela has $300 less than Jessica.
After Pamela spent her $60, she will now have $360 less than Jessica.
So 5u = $360, 1u = $72
Money Pamela had at first = $72 + $60 = $132.

Hope this helps.

[corneyAmber]

http://i56.tinypic.com/9tmngi.jpg\">

[ozora]

Need help . Besides guess n check method, any other alt method for the following question. I have less than 270 marbles. The marbles can be kept equally in either 6 or 7 containers without remainder. What is the max. No of marbles I have?

[MathIzzzFun]

ozora:

Need help . Besides guess n check method, any other alt method for the following question. I have less than 270 marbles. The marbles can be kept equally in either 6 or 7 containers without remainder. What is the max. No of marbles I have?

Hi

answer is 252 if you are looking for the largest number that is less than 270. The number is divisible by both 6 & 7, so it has to be divisible by 42. The largest multiple of 42 that is less than 270 = 42 x 6 = 252.

cheers.