Math question.

[Raymondism]

  On 2/29/2012 at 5:18 AM, Joseph22 said:

that is what I am saying.

 

Anyway I think that cal with 1 is those type where old answer will still remain while U key in equation until U press =button.

 

lesson is:dun use calculator unless u r dealing with big numbers... simple question like this shld be using mental sum

[RadX]

  On 2/29/2012 at 5:19 AM, Raymondism said:

lesson is:dun use calculator unless u r dealing with big numbers... simple question like this shld be using mental sum

 

but u apply the rules worngly also you get wrong ans wat.

[SimonTan]

I tried with my Casio fx-95MS calculator...the answer is 1.

Is Japanese smarter than bill gates of not?

 

[Raymondism]

  On 2/29/2012 at 5:20 AM, RadX said:

but u apply the rules worngly also you get wrong ans wat.

 

ya tats why i say this question is not to test the ability of the person to multiply or divide.. its more to test whether the person understand the order of operations...

[Raymondism]

  On 2/29/2012 at 5:21 AM, SimonTan said:

I tried with my Casio fx-95MS calculator...the answer is 1.

Is Japanese smarter than bill gates of not?

 

no it means u need to change calculator

[Ben5266]

  On 2/29/2012 at 4:32 AM, Raymondism said:

6/2(1+2)= 6 / 2 x (1+2) = 6 / 2 x 3 = 3 x 3 = 9

No no no no no... should be..

 

6 / 2 x 3 => you have to do the multiplication first then divide.

So, 6/6 =1.

 

Just like y/x^2. We have to do x multipy with x first before y divide x^2.

 

 

[Mllcg]

what got me 9 was

 

6/2(2+1)

 

BODMAS

 

therefore,

 

u do the brackets first which is 3

 

then division which is 3

 

then multiply 3 x 3 =9

[Raymondism]

  On 2/29/2012 at 10:11 AM, Ben5266 said:

No no no no no... should be..

 

6 / 2 x 3 => you have to do the multiplication first then divide.

So, 6/6 =1.

 

Just like y/x^2. We have to do x multipy with x first before y divide x^2.

 

pengz.. u another one.. go read from beginning lah

[Joseph22]

All wrong lah...

 

6/2(1+2)

open bracket first.

 

6/2(1)+2(2)

then do the sum...

 

3+4

 

answer is 7

 

:P

 

hehe

[Sk65]

  On 3/1/2012 at 1:57 AM, Joseph22 said:

All wrong lah...

 

6/2(1+2)

open bracket first.

 

6/2(1)+2(2)

then do the sum...

 

3+4

 

answer is 7

 

:P

 

hehe

 

spot on.

[Raymondism]

  On 3/1/2012 at 1:57 AM, Joseph22 said:

All wrong lah...

 

6/2(1+2)

open bracket first.

 

6/2(1)+2(2)

then do the sum...

 

3+4

 

answer is 7

 

:P

 

hehe

 

u shld let A = 6/2(1+2)

then square both side....

then solve it

[Joseph22]

  On 3/1/2012 at 2:02 AM, Sk65 said:

spot on.

i have classmate solve this type of question like that after they learn algebra

[Freestylers09]

Algebra solving is 7

 

Not wrong also

[Sk65]

  On 3/1/2012 at 2:12 AM, Joseph22 said:

i have classmate solve this type of question like that after they learn algebra

 

during primary sch?

 

its not as if its 2(a+b)

 

the things inside the bracket are known wat

why need to expand?

your friend study until tao nao pai liao

[Joseph22]

  On 3/1/2012 at 2:19 AM, Sk65 said:

during primary sch?

 

its not as if its 2(a+b)

 

the things inside the bracket are known wat

why need to expand?

your friend study until tao nao pai liao

secondary school they fail their math all the way till sec 4.

[Sk65]

  On 3/1/2012 at 2:20 AM, Joseph22 said:

secondary school they fail their math all the way till sec 4.

 

ok

 

actually the rules quite straight forward ma.

 

just die die remember once.

 

see many yrs later,

many here still can remember.

 

like father always scold me (for other subjects)

foundation no good.

[Expertz]

  On 2/29/2012 at 4:59 AM, Espresso said:

Simple it's 9.

 

Rule 1. Calc all workings enclosed in brackets first

 

(1+2)

 

Rule 2. Remove the brackets.

 

Rule 3. Calc the first multiple or division symbol first

 

So its 6/2(1+2)

 

becomes 6/2(3)

 

Becomes 6 / 2 x 3

 

Apply rule 3 = 6/2 = 3. 3 x 3 = 9

 

after step 1:

6 / 2(3)

 

after step 2:

6 / 6

 

step 3:

1 (Final answer)

[Raymondism]

  On 3/1/2012 at 2:16 AM, Freestylers09 said:

Algebra solving is 7

 

Not wrong also

 

wrong la....

 

 

u believe J22????????????????????????? *faint*

 

Edited March 1, 2012 by Raymondism