Linked Questions

6
votes
4answers
2k views

Incorrect notation in math?

Does math have an incorrect notation / syntax? I don't mean writing misaligned notation (google), but when you take something like a number to powers to powers to powers, $${{2^2}^2}^3$$ (I was told ...
0
votes
4answers
921 views

Confusion notation: $1\div mn$ or $ 1 \div m \times n$? [closed]

Consider the expression $1\div (mn)(n^2)$. It should be understood that, in simplifying the above expression, one should get $$1\div (mn)(n^2) = 1 \div (mn) \times (n^2)=\frac{n^2}{mn}=\frac{n}{m}.$$ ...
6
votes
3answers
645 views

How to tell where parentheses go in functional notation?

The professor gave us a function $f(z) = \ln r + i \theta$ (this is for a complex analysis class). He doesn't like answering students' questions and there's no assigned textbook so I don't know where ...
6
votes
3answers
740 views

What is $9-5+2$? [closed]

What is 9-5+2 ? 9-5+2 = 6; //With Calculator 9-5+2 = 2; //Using BODMAS If you evaluate from the right it give you "2" which follows the law: Brackets-Of-...
2
votes
3answers
862 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 ...
1
vote
3answers
115 views

10 + 67 × 2= ?, This question is causing a ruckus among my friend [closed]

Help! How would you solve 10 + 67 × 2? I solved by putting a bracket between 10 and 67. Then multiplying by 2 Like this (10 + 67)2 = 154 However, others insist it's 144 and I'm wrong.
1
vote
3answers
137 views

What is a/b/c/d? That is: What is the correct order for multiple consecutive division operations? [duplicate]

Unlike with addition, subtraction and multiplication where the order of operations will lead to an unambiguous result when the rules of BIDMAS (or PEMDAS) are applied, this does not hold true for ...
1
vote
3answers
5k views

6/2*(1+2) is 1 or 9? [duplicate]

Possible Duplicate: What is 48÷2(9+3)? Please, look at the picture? Which calculator shows true result and how to prove achieved result?
0
votes
3answers
65 views

How to solve 'a÷b(c+d)'? [duplicate]

How to solve $a÷b(c+d)$? For example, $2÷4(8+16)$. Is it $($$\frac{2}{4}$$)(8+16)$ = $\frac{1}{2}$(8+16) = $\frac{1}{2}$(24) = 12? or $\frac{2}{4(8+16)}$ = $\frac{2}{4*24}$ = $\frac{2}{96}$ = $\...
-4
votes
3answers
419 views

Why do folks get different answers for 48/2(9+3)? [duplicate]

I did 48/2(9+3) as I thought I had been taught and got the incorrect answer of 2. There's got to be a reason why so many are not only getting the wrong answer but consistently getting the same wrong ...
6
votes
2answers
1k views

Is “applying similar operations from left to right” a convention or a rule that forces us to mark one answer wrong? [duplicate]

I saw this photo on my social network. The ambiguous expression $6\div2\times3$ yielded 2 different answers. The difference is the order of operations. If the division's done first then the answer ...
2
votes
2answers
116 views

Simple BODMAS question including bracket expansion [duplicate]

I am trying to understand what is seemingly basic arithmetic that is causing a divide amongst my colleagues $$ 8÷2(2+2) $$ To me respecting the order of operations it would appear the answer is <...
2
votes
2answers
180 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?
1
vote
2answers
31 views

Order of operations when using the ÷ symbol.

I always write equations using fractions to avoid confusion, but my textbook uses the ÷ symbol. This question asks to simplify and write the equation using positive exponents: $$x^{-1/3}y÷ xy^{-1/3}$$...
1
vote
2answers
52k views

Evaluating $6^2\div 2(3)+4$: is the answer $10$ or $58$? [duplicate]

Evaluating $$6^2\div 2(3)+4$$ I understand how people are getting $10$ but I am getting $58$ because I am not distributing the $2$ to the $3$ inside the parentheses. Is that correct?

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