Q&A - P4 Math

[MathIzzzFun]

mrskoo123:

Hi need help on following qns:


Alvin paid $26 for 4 books and 3 pens.
John paid $1 less than Alvin for 3 books and 5 pens.
What was the total cost for 1 book and 1 pen?

thanks in advance

Hi

grouping concept in pictorial...

http://i45.tinypic.com/fnwxub.png\">

cheers.

[24hr-mum]

MathIzzzFun, that’s a great way. How did u get the idea of duplicating the 4book+3pen equation?

[24hr-mum]

stimes i find it ridiculous that sch are setting questions that the child cant do and even parents stimes are intimidated…, and its just primary questions. sigh…

[MathIzzzFun]

24hr-mum:

MathIzzzFun, that's a great way. How did u get the idea of duplicating the 4book+3pen equation?

Using same gap concept, 5pens 3books -- gap of 2, 4 books 3pens -- gap of 1, so double 4 books +3pens to get gap of 2.

cheers.

[PiggyLalala]

MathIzzzFun:

24hr-mum:

MathIzzzFun, that's a great way. How did u get the idea of duplicating the 4book+3pen equation?

Using same gap concept, 5pens 3books -- gap of 2, 4 books 3pens -- gap of 1, so double 4 books +3pens to get gap of 2.

cheers.

:thankyou: learn something new again.
U are a great Maths teacher.

[Jamesbond]

http://i50.tinypic.com/wu5dog.jpg\">


Pl help.... :scared:

[Jamesbond]

PiggyLalala:

MathIzzzFun:

[quote=\"24hr-mum\"]MathIzzzFun, that's a great way. How did u get the idea of duplicating the 4book+3pen equation?

Using same gap concept, 5pens 3books -- gap of 2, 4 books 3pens -- gap of 1, so double 4 books +3pens to get gap of 2.

cheers.

:thankyou: learn something new again.
U are a great Maths teacher. :)[/quote]MathIzzzFun U r really great...I did learn this method now.... :rahrah:

[MathIzzzFun]

Jamesbond:

http://i50.tinypic.com/wu5dog.jpg\">


Pl help.... :scared:

Hi

How many ways can the 18 squares be cut from the \"unshaded\" part ?
--> 1 row x 18 squares
--> 2 rows x 9 squares
--> 3 rows x 6 squares

from here, can you figure out the solution?

cheers.

[24hr-mum]

how to do:

ray n serene hv total of $1183.
serene n tim hv total of $1124.
ray n tim hv total of $961.
how much does tim hv?

[CMF]

24hr-mum:

how to do:

ray n serene hv total of $1183.
serene n tim hv total of $1124.
ray n tim hv total of $961.
how much does tim hv?

R+S = 1183
S+T= 1124
R+T=961

(R+S)+(S+T)=1183+1124
2S+(R+T)=2307
2S+961=2307
2S=1346
S=673

S+T=1124
T=1124-673
T=451