Q&A - P5 Math

[PapayaDad]

Total = 8u

A=5u
B=5u-36
C=20

5u+5u-36+20=8u
10u-16=8u
10u-8u=16
2u=16
u=8

Total = 8u = 8 x 8 = 64

[2Transformer]

Thank you, smartmummy. I really appreciate it.

[shaz]

Thank you very much Payapadad! Am stuck wz another


L & M & N shared the cost of a present. L paid 1/4 of the total share of M&N. M paid 1/9 of the total share of L&N. N paid $60 more than M. What is the cost of the present? Many thanks to anyone who can help

[Oldschool]

shaz:

Thank you very much Payapadad! Am stuck wz another


L & M & N shared the cost of a present. L paid 1/4 of the total share of M&N. M paid 1/9 of the total share of L&N. N paid $60 more than M. What is the cost of the present? Many thanks to anyone who can help

Hi,

L : M + N
1 : 4 (total 5)
2 : 8 (total 10, total unchanged)

M : L + N
1 : 9 (total 10)

So,
L : M : N
2 : 1 : 7 (total 10, total unchanged)
2U : U : 7U

N-M -->7U – U --> 6U -->60
U -->10

Cost -->10U--> $100


Similar type of question but same/different approach,

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=997863#p997863

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?p=998230#p998230

Regards

[shaz]

Thank u very much Oldschool. Really appreciate your help

[doraemo]

smartmummy:

doraemo:

pls help

(2)\tIn April A,B C and D had a total of $324. In May , the savings of the 4 girls became equal when A’s savings was doubled, B’s savings was reduced by $4, C’s saving remained unchanged and D’s savings was increased by $9. What was B’s and D’s savings in April?

In May
A [ u ][u ]
B [ u ][u ] 4
C [ u ][u ]
D [u][u-9]

In Apr
u+2u+4+2u+2u-9=324


7u=329
u=47
B's in April=2*47+4=$98
D's in April=2*47-9=$87

Thank you, smartmummy!!!!

pls help , qn 1....
(1) W and R collect stamps. If R gives W 15 stamps, he will have the same number of stamps as W. If W gives R 15 stamps, he will have ½ as many stamps as R. How many stamps does each of them have?

[smartmummy]

Hi doraemo!

I tried my best, but i couldn’t solve the qn1. May someone else help u.

[The Right Equation]

doraemo:

pls help




(1)\tW and R collect stamps. If R gives W 15 stamps, he will have the same number of stamps as W. If W gives R 15 stamps, he will have ½ as many stamps as R. How many stamps does each of them have?

1st, draw the model for R having 2 small units (of 15 stamps each) more than W.

http://i43.tinypic.com/fntxqw.jpg\">

[PapayaDad]

need to draw model ; R=105 ; w=75

[doraemo]

got it…

thank you, smartmummy,The Right Equation & papayaDad.