Q&A - PSLE Math

[tianzhu]

homeworkmummy:

Hi, can someone help me with St Nicks 2011 P6 SA1 paper Q26. Can't upload the document as I don't have a scanner.....appreciate it.

Hi

Q26 on page 13

http://www.orlesson.org/orp/11Ma/2011-P6-Math-SA1-StNics.pdf

X,Y and Z shared the shaded part.

Z (shaded) -------- 3
Z (unshaded) -------- 5

X (shaded) -------- 3
X (unshaded) -------- 9

Y (shaded) -------- 3
Y (unshaded) -------- 12

Shaded area of Y : total area of figure ------- 3:29 (3+5+9+12)

Best wishes

[homeworkmummy]

tianzhu:

homeworkmummy:

Hi, can someone help me with St Nicks 2011 P6 SA1 paper Q26. Can't upload the document as I don't have a scanner.....appreciate it.

Hi

Q26 on page 13

http://www.orlesson.org/orp/11Ma/2011-P6-Math-SA1-StNics.pdf

X,Y and Z shared the shaded part.

Z (shaded) -------- 3
Z (unshaded) -------- 5

X (shaded) -------- 3
X (unshaded) -------- 9

Y (shaded) -------- 3
Y (unshaded) -------- 12

Shaded area of Y : total area of figure ------- 3:29 (3+5+9+12)

Best wishes

Thanks Tianzhu for the help!

[kklau]

Hi,

Appreciate anyone's help for this question.

The diagram, not drawn to scale, shows two similar triangles and quadrants. Find the area of the shaded part.

http://i48.tinypic.com/9vi2ir.jpg\">

Thank you!

[MathIzzzFun]

Mr OK:

Hello everyone, I'm new to this forum. Would appreciate some help for these questions:-


1) Mr Lau sells notebooks at $2 each and files at $3 each. After he sold 100 notebooks and files, the amount he collected from the sale of notebooks was $60 more than than the amount collected from the sale of files. How many notebooks did Mr Lau sell?

Hi

supposition or assumptive method, using area model...

http://i46.tinypic.com/n4bf5s.png\">

cheers.

[MathIzzzFun]

kklau:

Hi,

Appreciate anyone's help for this question.

The diagram, not drawn to scale, shows two similar triangles and quadrants. Find the area of the shaded part.

http://i48.tinypic.com/9vi2ir.jpg\">

Thank you!

Hi

http://i47.tinypic.com/2u77kwn.png\">

cheers.

[tianzhu]

kklau:

Hi,

Appreciate anyone's help for this question.

The diagram, not drawn to scale, shows two similar triangles and quadrants. Find the area of the shaded part.

http://i48.tinypic.com/9vi2ir.jpg\">

Thank you!

Hi

P6 students will be well versed in finding out the area of square when its diagonal is given.

Shaded area -------- Area of semi circle of radius 10 cm - area of square with diagonal 10cm

Shaded area -------- (3.14*100)/2 – (10*10)/2 --------- 157 – 50 ------ 107

Best wishes

[MathIzzzFun]

Mr OK:

Hello everyone, I'm new to this forum. Would appreciate some help for these questions:-


2) There are some blue chips and red chips in a bag. If 2 blue chips are removed from the bag, the number of blue chips will be 1/6 of the total number of chips left.
If 4 red chips are removed from the bag, the number of blue chips will be 1/4 of the total number of chips left. How many chips are there in the bag?

Hi

using MD..

http://i49.tinypic.com/14w8ytt.png\">

cheers.

[MathIzzzFun]

Mr OK:

Hello everyone, I'm new to this forum. Would appreciate some help for these questions:-


3) Sally had 20 more books than Ali. After Sally gave 15 of her books to Ali, Sally's remaining number of books was 3/8 of their total number of books.
A) How many books did Ali have at first?
B) What is the difference in the number of books they finally had?

Hi

http://i48.tinypic.com/2mnq3nk.png\">

cheers.

[Chan09]

Hi Tianzhu,


Sorry still unable to draw this out on a model diagram:
A has $900 more than B. A gave B some money. In the end B had $880 (as not $800 as previously stated more than A. How much did A give B? :?

Can you advise, thank you

[MathIzzzFun]

Chan09:

Hi Tianzhu,


Sorry still unable to draw this out on a model diagram:
A has $900 more than B. A gave B some money. In the end B had $880 (as not $800 as previously stated more than A. How much did A give B? :?

Can you advise, thank you

Hi

the MD..

http://i45.tinypic.com/2hzs5xx.png\">

cheers.