48 questions linked to/from What is 48÷2(9+3)?
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 ...
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 $$1\div (mn)(n^2) = 1 \div (mn) \times (n^2)=\frac{n^2}{mn}=\frac{n}{m}.$$ ...
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 ...
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-...
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 ...
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.
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 ...