Math: right answer

[mda_]

ok if it's so elementary why do half the calculators and the sources i mentioned earlier give 288? are all the engineers who made those devices and softwares idiots then?

yung TI calculator ewan ko kung bat ganun yun pero yung sa sharp, pati sa excel, 288 yung sagot pag nilagay mo yung "x" or "*" (although sa excel, di kasi nagwowork yung parenthesis for multiplication). kasi, pag meron nito, straight line yung pagbasa nung expression.




+1. i think there is no discussion if this is handwritten.

also, this is not an equation but just an expression. next, why mention pemdas and then NOT apply P first?

arithmetic.

ok, sorry EXPRESSION. applied nga yung P, kaya 2 yung sagot. you solve what's INSIDE the parenthesis first.

[jansky]

guys.. mali pala ung 2 at ung 288 na sagot

ito pala tamang sagot dyan

48 / 2= 24
9+3 = 12

24+12 = [SIZE=7]36[/SIZE][SIZE=2]

wala ng kokontra dyan sinagot ng Prof sa MIT nyahahaahahah
[/SIZE]

[Bin Diesel]

kasi nga alam na ng sharp W506 ang gumamit ng coefficient at hindi lamang PEMDAS ang alam niyang gamitin ... (lols parang nasabi ko na yata ito)

nasobrahan nga yata ang features ng calculator na ito ... ipinagbawal sa EE Board Exam

bawal sharp di kasi consistent ang sagot.

[Bin Diesel]

mali yung 288. 2 ang sagot.

__48 __
2(9+3)

yan dapat kasi yung basis. hindi distributable ang division sa addition/subtraction/multiplication. ang multiplication lang ang distributable sa addition/subtraction. tapos.

your equation if written in a straight line would look like this 48/[2(9+3)] which clearly is not the case.

[rene_tagle]

your equation if written in a straight line would look like this 48/[2(9+3)] which clearly is not the case.

+1, ang dami kasi nagbabago ng equation kaya paiba-iba sagot, simple lang naman e, 48/2(9+3) ang problem at hindi 48/[2(9+3)]. iniignore na yung importance ng bracket at parenthesis, dapat baguhin na ang PEMDAS at gawin ng EMDAS, at ang BODMAS gawin ng OMDAS para maging 2 ang sagot.

[Bin Diesel]

with this equation, x = 48/2(9+3)

2(9+3) should be solved first. [SIZE=3]you cannot separate 2 from (9+3) because it is considered as one entity[/SIZE]. afaik those expressions with parenthesis should be simplified first. kahit na ganong kahaba ang equation basta the first step is to simplify the equation by solving first those expressions inside the parenthesis..

then solve for 48/24 = 2.

therefore my answer is 2..

from what i learned in engineering math this is not true.

[Haruto]

from what i learned in engineering math this is not true.

Kindly expound sir.

[niky]

You guys are still at it?

Let's be clear... the PEMDAS rule is a red herring.

it's not about whether you do the multiplication or division first, but about implicit and explicit expression... which though some claim is not a hard and fast rule, is still a rule given advanced math.

Let's write this form as an algebraic expression:

48/2(9+3)... we're clear that 9+3 is done first, whatever else may hold, so:

48/2(12)

Now, let's write it as thus:

48 = a
2 = b
12 = c

Now, we can rewrite it as thus:

a/bc

So... can anyone who's actually studied math claim that:

a/bc =

ac
b

instead of:

a
bc

The first gives you 288. The second gives you 2.

To actually get ac/b, you need to rewrite the expression as thus: a/b*c.

Since no explicit "*" or "x" sign is used, you regard the whole as part of the denominator, using the division sign as a grouping sign (fractional)... which is exactly what the division sign is.

[rene_tagle]

You guys are still at it?

Let's be clear... the PEMDAS rule is a red herring.

it's not about whether you do the multiplication or division first, but about implicit and explicit expression... which though some claim is not a hard and fast rule, is still a rule given advanced math.

Let's write this form as an algebraic expression:

48/2(9+3)... we're clear that 9+3 is done first, whatever else may hold, so:

48/2(12)

Now, let's write it as thus:

48 = a
2 = b
12 = c

Now, we can rewrite it as thus:

a/bc

So... can anyone who's actually studied math claim that:

a/bc =

ac
b

instead of:

a
bc

The first gives you 288. The second gives you 2.

To actually get ac/b, you need to rewrite the expression as thus: a/b*c.

Since no explicit "*" or "x" sign is used, you regard the whole as part of the denominator, using the division sign as a grouping sign (fractional)... which is exactly what the division sign is.

hahaha! simpleng straight line problem solving ginawang complikado, ayoko na!

[Bin Diesel]

Kindly expound sir.

In engineering kasi sir parenthesis is also interpreted as multiplication kaya it's not automatic to say na isang entity lang ang expression na kagaya ng "2(9+3)". Kaya very important sa amin ang tamang gamit ng brackets and parenthesis kasi para masabing isang entity sila dapat may bracket kagaya ng "[2(9+3)].
Ito rin ang reason kaya 288 ang naging sagot ko. 48/2*12 ang magiging result kapag inaad yung nasa loob ng parenthesis the solve the equation from left to right kasi equal na lahat ng hierarchy nila.

[mda_]

+1, ang dami kasi nagbabago ng equation kaya paiba-iba sagot, simple lang naman e, 48/2(9+3) ang problem at hindi 48/[2(9+3)]. iniignore na yung importance ng bracket at parenthesis, dapat baguhin na ang PEMDAS at gawin ng EMDAS, at ang BODMAS gawin ng OMDAS para maging 2 ang sagot.

eh kung straight line tapos 288 ang sagot, dapat ang equation ay:

(48/2)(9+3) = 288
or

[48*(9+3)]/2


This is why i maintain na 2 yung sagot given na 48/2(9+3) yung straight line equation na binigay.

[flakez]

haha. ang gulo.

answer ko is 288 kasi walang parenthesis yung 2(9+3).

sa explanation ni niky, bc is considered as b*c. kelangan pag hiwalayin kasi 2 separate entity sila. kung hindi pag hihiwalayin yung bc dapat 212 yun unless may parenthesis. hehehe.

[mda_]

In engineering kasi sir parenthesis is also interpreted as multiplication kaya it's not automatic to say na isang entity lang ang expression na kagaya ng "2(9+3)". Kaya very important sa amin ang tamang gamit ng brackets and parenthesis kasi para masabing isang entity sila dapat may bracket kagaya ng "[2(9+3)].
Ito rin ang reason kaya 288 ang naging sagot ko. 48/2*12 ang magiging result kapag inaad yung nasa loob ng parenthesis the solve the equation from left to right kasi equal na lahat ng hierarchy nila.

following yung logic mo regarding parenthesis, dapat naka-parenthesis din yung other half ng equation para maging totoo ang 288

(48/2)(9+3) = 288

since walang parenthesis, 2 ang sagot.

[mda_]

WHY 288 IS WRONG:

By COMMUTATIVE PROPERTY, which is AB=BA, those assuming that we have to do the problem LEFT TO RIGHT is also assuming that the problem can be like so:
(48÷2)(9+3)
(9+3)(48÷2)
12*24
288

If you want to work by THAT, then, you’re assuming that this problem is the same as the original:
9+3(48÷2)
9+3(48÷2) ≠ 48÷2(9+3)

That’s a completely different problem, and this would get a completely different answer besides 288 and 2. (The answer is 81.)

THE ANSWER IS 2.

[flakez]

eh kung straight line tapos 288 ang sagot, dapat ang equation ay:

(48/2)(9+3) = 288
or

[48*(9+3)]/2


This is why i maintain na 2 yung sagot given na 48/2(9+3) yung straight line equation na binigay.

kung staright line, walang distributive ek ek. 288 yan

as posted before. if apply ang P E (M or D) (A or S)

9 + 3 muna tapos 48 divide by 2 muna kasi M or D. kung ano mauna from left to right, hindi ibig sabihin mauuna ang M sa D sa PEMDAS, EMDAS, etc. M or D yan saka A or S. so 24 ang sagot. then saka papasok yung M. 24 times 12


pwede ba sa Mythbusters to? hahahaha

[mda_]

kung staright line, walang distributive ek ek. 288 yan

as posted before. if apply ang P E (M or D) (A or S)

9 + 3 muna tapos 48 divide by 2 muna kasi M or D. kung ano mauna from left to right, hindi ibig sabihin mauuna ang M sa D sa PEMDAS, EMDAS, etc. M or D yan saka A or S. so 24 ang sagot. then saka papasok yung M. 24 times 12


pwede ba sa Mythbusters to? hahahaha

kaya uunahin yung multiplication in this case kasi may parenthesis, hindi dahil left to right. inside parenthesis muna, (9+3), tapos multiply by 2, tapos yung sagot yung pangdidivide sa 48. hindi lang left to right, i-simplify muna ang lahat ng parenthesis (dapat mawala ito) before proceeding to the other operations.

[flakez]

kaya uunahin yung multiplication in this case kasi may parenthesis, hindi dahil left to right. inside parenthesis muna, (9+3), tapos multiply by 2, tapos yung sagot yung pangdidivide sa 48. hindi lang left to right, i-simplify muna ang lahat ng parenthesis (dapat mawala ito) before proceeding to the other operations.

ang nasa loob ng parenthesis is yung 9+3 and hindi kasama yung 2.

so after ma solve yung parenthesis (9+3) wala ng may parenthesis.kung lalagyan ng parenthesis lahat para ma distinguish yung mga single entity magiging ganito.

(48)/(2)(9+3)
(48)/(2)(12)

tapos apply yung PEMDAS.

malaking bagay yung parenthesis kung ginawang (2(9+3)) madali sagutin na 2 yan.

[chua_riwap]

ilapit nyo na sa isang "math genius/wizard" yan. kung ano sagot nya.....yun na. wala nang mahabang discussion pa........

[mda_]

ilapit nyo na sa isang "math genius/wizard" yan. kung ano sagot nya.....yun na. wala nang mahabang discussion pa........

oo ayoko na mag-argue. PEMDAS EMDAS, TODAS na lang!

[renzo_d10]

x=(), pareho lang yan, malamang outdated yang calc mo.

kahit saan forum ako pumasok halos lahat 288 ang sagot, ilan lang ang 2, dito lang sa tsikot marami nagsabing 2.

pansinin nyo yung model number ng calc, magkaiba, yung old model 2 ang sagot, yung new model 288, ibig sabihin nito nakita sa old model yung pagkakamali kaya binago sa new model, kaya 288 ang tamang sagot.



sir subukan nyo ulitin sa higher model(new model) ng sharp yan sigurado ako 288 na sagot nyan.

Eto, this is a close to new sci-cal. About a month old. Bought * National Bookstore to replace our old one.[SIZE=1]And this was also used by a relative of mine who took the real estate broker's board exam & passed the test with flying colors ... [/SIZE]

Canon F-760S