Tagged Questions
8
votes
3answers
77 views
Why are the order-of-operations conventions good?
Children are sometimes taught silly mnemonics like "PEMDAS" to remember conventions on order of operations. (I never heard of "PEMDAS" until long after graduating from college, as far as I can ...
1
vote
3answers
76 views
Order of operations in rotation matrix notation.
I'm trying to convert this equation to C# but I'm not a mathematician and I find math notation ambiguous:
See the first matrix in this article:
http://mathworld.wolfram.com/RotationMatrix.html
...
0
votes
3answers
95 views
Dumb percentage question?
Why do we multiply by 100 while calculating percentage ?
example : 2/100 * 100 =2%
0
votes
2answers
57 views
order of operations division
Very dumb question:
What is the order of operations in the following:
PEMDAS a/b+c = a : b + c (where ":" is the division symbol)
7/1+6 or 7:1+6
in the example below is it 1 or 13?
5
votes
2answers
244 views
Powers in ASCII text
I have a problem reading a discussion forum post. Namely, in the ASCII text, is 2^3^4 the same as $(2^3)^4$ or $2^{3^4}$?
1
vote
1answer
79 views
Correct precedence of division operators
Say i have the followingv operation - $6/3/6$, i get different answers depending on which division i perform first.
$6/3/6 = 2/6 = .33333...$
$6/3/6 = 6/.5 = 12$
So which answer is correct?
2
votes
3answers
497 views
What is the “status” of the rule that multiplication precedes addition.
What is the source, or "status", of the rule that multiplication is performed before addition?
Is it a definitive property of $\mathbb R$, a property that can be derived directly from the definition ...
0
votes
2answers
85 views
Radix point notation and significant digits
So, we represent numbers usually in a form of a sequence of digits where each one of them multiplies the power of a base:
$13.2 = 1 * 10^1 + 3 * 10^0 + 2 * 10^{-1}$
So that much is clear, perfectly. ...
0
votes
2answers
220 views
bitwise operations
so my question is what is the order of operations for bitwise operators
<< & |
and also to see if my logic is right with the problem below
(x03 << x08)+ x00 = 300
...
10
votes
1answer
486 views
What is mathematical basis for the percent symbol (%)?
Percent means 1 part of 100 or 1/100 and is indicated with %. Per mille means 1 part of 1000 or 1/1000 and is indicated with ‰, so it seems that these symbols indicate the mathematical operations ...
3
votes
3answers
5k views
What is “multiplication by juxtaposition”?
I was reading http://www.purplemath.com/modules/orderops2.htm it shows
= 16 ÷ 2[2] + 1 (**)
...
= 5
The general consensus among math
people is that ...
3
votes
4answers
8k views
What is 48÷2(9+3)? [duplicate]
Possible Duplicate:
Do values attached to integers have implicit parentheses?
Implicit multiplication order of operation
There is a huge debate on the internet on 48÷2(9+3). I figured if ...
5
votes
4answers
487 views
Long division notation (census of nations)
The Wikipedia article on long division explains the different notations. I still use the European notation I learned in elementary school in Colombia. I had difficulty adapting to the US/UK notation ...
