O-Level Additional Math

[jieheng]

KiausuLormee:

Sorry JieHeng this is the exact question that need your help in solving:

Express 0.368 as a fraction in its lowest term.
(6 and 8 is a recurring decimal)

Let X = 0.3686868....

1000X = 368.686868....

10X = 3.686868....

1000X -10X = 368.686868.... - 3.686868....

990X = 365
X = 365/990 = 73/198

[KiausuLormee]

Thank you so much in your help Jieheng, really appreciated

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[KiausuLormee]

Hi JieHeng , need your help to solve this P6 question. I’m in a loss of doing?


Tom and Jack had a total of $1440.Tom gave 1/4 of his money to Jack.Jack then gave 1/3 of the total amount of money he had to Tom.In the end,each of them had the same amount of money .How much did each boy have at first?

[jieheng]

KiausuLormee:

Hi JieHeng , need your help to solve this P6 question. I'm in a loss of doing?


Tom and Jack had a total of $1440.Tom gave 1/4 of his money to Jack.Jack then gave 1/3 of the total amount of money he had to Tom.In the end,each of them had the same amount of money .How much did each boy have at first?

Pls post P6 Maths question on Q&A - PSLE Math

After Jack gave 1/3 of the total amount of money he had to Tom , he left 2/3 of his money . Jack --> 2u and he gave 1u to Tom

In the end
Jack 2u
Tom 2u

Before Jack gave 1/3 (1u) of the total amount of money he had to Tom
Jack 3u
Tom 1u

After Tom gave 1/4 of his money to Jack , he left 3/4 of his money.
3/4 --> 1u , as 1u is not divisible by 3 , change Tom 1u --> 1u*3 = 3u and Jack 3u --> 3u*3 = 9u

New ratio
Jack 9u
Tom 3u

3/4 --> 3u
1/4 -->1u
Tom gave 1/4 (1u) of his money to Jack

At first
Jack 8u
Tom 4u

8u + 4U --> 1440
12u --> 1440
1u -->120

Jack
8u --> 8*120 = 960

Tom
4u --> 4*120 = 480

[KiausuLormee]

Thank you JieHeng for your help.


:thankyou:

[Michaelia0816]

Pls help me it is very urgent!Thank you very much!

Question:

It is given that A=h(4m+1/3r).

Find the exact value of A when h is 20m, m is 1/5 and r is -7.

[jieheng]

Michaelia0816:

Pls help me it is very urgent!Thank you very much!

Question:

It is given that A=h(4m+1/3r).

Find the exact value of A when h is 20m, m is 1/5 and r is -7.

I assume 1/3r as (1/3)r and not 1/(3r)

A
=h[4m+(1/3)r]
=20m[4m+(1/3)r]
=20(1/5)[4(1/5) + (1/3)(-7)]
=4(4/5 - 7/3)
=4( 12/15 - 35/15 )
=4 (- 23/15)
= - 92/15
= - 6 2/15

[S-H]

Hi, can someone help me with these 2 questions?


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Thank you!

[S-H]

Hi, can someone help me with these 2 questions?


http://i46.tinypic.com/en0nr.png\"> http://i48.tinypic.com/28gw2ab.png\">

Thank you!