UPSR Maths Question

[ALBundy]

That question is valid, more like the addition, subtraction, division and multiplication rules. Which one takes precedence.

 

[astroboy]

wrong answer... the answer is C = 48.50

If u use an expensive calculator and press 48 + 6 / 12, u'll get 48.50..

 

[astroboy]

Another question I answered recently in a Std 4 exercise,

How may days are there in 15 years, 3 of which are leap years..

 

[datsunnismo]

48+ 6/12
48+ (6/12)
48+ 0.5
= 48.50

 

[ess530i]

If u use an expensive calculator and press 48 + 6 / 12, u'll get 48.50..

i use Canon also get 4.50 one? what calculator did you use to get 48.50 la?

 

[bluepanther]

actually... i am using UPSR math questions as IQ test for hiring new employees. the good ones are often able to answer all except these weird questions. to my surprise many get below 80%, even those with SPM cert. they normally fail to answer questions related to unit conversion eg. ml to l, kg to g and naming the figure in a million eg. how much is 5 in 1.05 million... even one working for 20years at a large multinational companies cant answer...no wonder he got retrenched. its not even funny...

...no wonder he cannot buy BMW:hmmmm2::hmmmm2::hmmmm2:

 

[ALBundy]

If u use an expensive calculator and press 48 + 6 / 12, u'll get 48.50..

Wah no bad your china made calculator, programmed with precedence law hehehe.:top:

 

[ramsing]

hahaha...wah, like this also can make topic ar. actually, right now if u give me the add maths book for form 4/5, i'll use it put under my car tyre so it wont roll down the hill.

i'm not sure about the older unkers in the forum, but during my time, which was KBSM period, the point was to remmeber as much things as u can for the exams, then forget after that. its quite sad, coz going to school was more to just play around and then memorise for exams. other than maths subjects which required practice practice practice, the rest was a memorising game.

dy/dx ar?? hahaha...its been such a long. sometimes i wonder going to school is not about the education, but more about social development and learning how to 'kau lui / chai' and how to hantam the other team when u lost the game.

 

[bmwky]

i tot most students use scientific calculators nowadays ...so there is no way they can get a wrong answer for questions involving precedents. unless......Intel inside Idiot Outside.

 

[yeop]

hahaha...at least I make my brain re-work today, lay off for a while, coz no mathematical related to think off lately(economy slowdown!)...calculator also collecting dust already...thanks guys for the refreshment..

 

[BMW9700]

as i was taught in shool the " BODMAS" priority
B=brackets
O= of or multiply
D= division
M=mutliply
A=addition
S=subtract


in a similar way, sine, cosine and tangent of an angle in a right angled triangle..

sir charles tan = Old Harry And His Old Aunt

S(sir)= O(old)/H(harry)
C(charles)A(and)/H(his)
T(tan)=O(old)/A(aunt)

that isythogaras theorem:

sine of an angle= opposite /hypotenuse
cosine of an angle= adjacent/hypotenuse
tangent of an angle=opposite/adjacent

always works and i still use it as an engineer now...ha ha..really appreciate my teacher mrs yeoh...

regards

 

[shyful313]

good refreshment question for otai2...:top:

 

[svelte]

i use Canon also get 4.50 one? what calculator did you use to get 48.50 la?

I can't help answering this..
In mathematical rule, the division must be done first in reference to the question.
So even if u use calculator..u must do the 6/12 = 0.5 first.. then only u add 48.

For this question 48 + 6/12 the answer is definitely = 48.5

 

[svelte]

as i was taught in shool the " BODMAS" priority
B=brackets
O= of or multiply
D= division
M=mutliply
A=addition
S=subtract


in a similar way, sine, cosine and tangent of an angle in a right angled triangle..

sir charles tan = Old Harry And His Old Aunt

S(sir)= O(old)/H(harry)
C(charles)A(and)/H(his)
T(tan)=O(old)/A(aunt)

that isythogaras theorem:

sine of an angle= opposite /hypotenuse
cosine of an angle= adjacent/hypotenuse
tangent of an angle=opposite/adjacent

always works and i still use it as an engineer now...ha ha..really appreciate my teacher mrs yeoh...

regards

My teacher thought me different pnemonics for pythagoras theorem :

TOA CAH SOH = Big Leg Aunty

goes as the same :-
Tangent(T) = opposite(O)/adjacent (A)
Cosine (C) = Adjacent (A)/Hypotenuse (H)
Sinus (S) = Opposite (O) / Hypotenuse (H)

though I'm not involve with mathematics much in my work, this can still be remembered and useful sometimes :top: