Linked Questions

18
votes
11answers
6k views

Do values attached to integers have implicit parentheses?

Given $5x/30x^2$ I was wondering which is the correct equivalent form. According to BEDMAS this expression is equivalent to $5*\cfrac{x}{30}*x^2$ but, intuitively, I believe that it could also look ...
0
votes
1answer
46k views

The equation: 18 ÷ 3 ( 5 - 4 + 1 ) = 3 or 12? (order of operation) [duplicate]

the question might be simple to solve but when entered in google search as: 18/3(5-4+1) you get 12! However, If it was done using the order of operation it is ...
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?
2
votes
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?
1
vote
2answers
1k views

Order of Operations: What is value of the $6/4*4\;$? [duplicate]

Possible Duplicate: What is 48÷2(9+3)? My friend asked me value of expression 16/4*4. So what is value of 16/4*4? Is ...
1
vote
2answers
7k views

Casio Calculators Give 2 Different Answers [duplicate]

Possible Duplicate: What is 48÷2(9+3)? Sorry if this has already been asked, my searches were fruitless... There's been a buzz lately about the different results given by two different ...
0
votes
2answers
4k views

What does this equal? $6\div 2(1+2)$ [duplicate]

How do you figure out what $$6\div 2(2+1)$$ is equal? I get $9$, but some people say $7$ or even $1$ and I don't know how they get that? What does it really equal?
1
vote
1answer
8k views

Do we divide first or multiply first if we don't have any other information [duplicate]

Possible Duplicate: What is 48÷2(9+3)? 6/2*(1+2) is 1 or 9? order of operations division Apparently a very simple question but My question basically is, whether the answer of the ...
-2
votes
1answer
2k views

Operator precedence [duplicate]

Possible Duplicate: What is 48÷2(9+3)? Hi all I don't know if anyone has seen this question floating around Facebook, but me and a friend are a little conflicted. The question is: $6 \div ...
-2
votes
1answer
2k views

A simple but ambiguous expression [duplicate]

Possible Duplicates: Implicit multiplication order of operation What is 48÷2(9+3)? i am so confused after knowing different answer of this ques 48/2(9+3) though google cal comes up with ...
-4
votes
3answers
418 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 ...
0
votes
2answers
798 views

Order of computation [duplicate]

Possible Duplicate: What is 48÷2(9+3)? In the field of real numbers, does the expression 10 / 2 * 5 make sense? Is it 25 or 1? Is it a bad question or the order of computation from left-to-...
1
vote
0answers
1k views

Implicit multiplication order of operation [duplicate]

Possible Duplicate: What is 48÷2(9+3)? $\begin{equation} 48 \div 2(9+3) = ? \end{equation}$ Is the answer to that 2 or 288? What is the order of operations for implicit multiplication?
1
vote
2answers
199 views

Precedence of concatenation: Is $5/7y$ equal to $(5/7)\times y$ or $5/(7\times y)$? [duplicate]

Possible Duplicate: Do values attached to integers have implicit parentheses? What is 48÷2(9+3)? What is “multiplication by juxtaposition”? What is the precedence of the ...
1
vote
3answers
132 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 ...
-3
votes
2answers
73 views

$ 36 ÷ 6( 9 – 3) = ?$ $1$ or $36$ [duplicate]

1) $ 36 ÷ 6( 9 – 3) = ?$ $1$ or $36$ 2) $36 ÷ 6^{ (5 – 3)} \times 6 = ?$ $6$ or $216$ My Attempt : I used "VBODMAS" rule to solve the problem. 1) $ 36 ÷ 6( 9 – 3) =36 ÷ 6$ of $6$ $=...
2
votes
2answers
114 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 <...
0
votes
2answers
113 views

What is 6%2(2+1) and why? [duplicate]

This one is a classic, but never-the-less, it's been bothering me since I've read several contradicting answers, yet none of them has convinced me completely. So, how do I properly and correclty ...
-4
votes
2answers
115 views

Simple algebra, but causing arguments in a home school co-op discussion. $6^2/2(3)+4$ [duplicate]

Trying to get some human opinion on this problem. Very simple equation, but it is eliciting quite the controversy. I have executed it in Ruby, Java, C#, Javascript, Python, Perl and Excel with the ...
0
votes
1answer
109 views

Proof of Equality [duplicate]

Possible Duplicate: What is 48÷2(9+3)? I was having a heated debate with my colleague and we can't agree on the answer to this question: Does 6÷2(2+1) equal 9 or does it equal 1?
1
vote
1answer
51 views

$8:4\times2=1$ or $8:4\times2=4$? [duplicate]

A simple question but I know two conflicting rules on this: Multiplication is stronger that dividing: $8:4\times2=8:8=1$ Dividing is the same as multiplication with the inverse: $8:4\times2=8\times4^{...
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 $\frac{2}{4(8+16)}$ = $\frac{2}{4*24}$ = $\frac{2}{96}$ = $\...
-3
votes
2answers
59 views

Simple math question [duplicate]

6/2(2+1) = 9 or 6/2(2+1) = 1 I am not really sure which is the correct answer. I think the latter is much more correct than the former. If we assume the property of distribution then the latter can be ...
1
vote
0answers
30 views

What is 6/2(3), 1 or 9? According to PEMDAS M > D so it should be 1! [duplicate]

Pretty much what question says. 6÷2x3 = 1 or 6÷2x3 = 9 Given PEMDAS, I'd bet ...
0
votes
0answers
29 views

Order of muliplication with or without times sign [duplicate]

Is 6:2(2+1)=1 or is 6:2(2+1)=9 ? I can't find any information regarding the order of multiplication without a sign. I'm sure that 6:2*(2+1) is 9, but I'm not sure about this.
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 ...
3
votes
6answers
50k views

8 / 4 (4-2) = ? What is answer? [duplicate]

What is answer for 8 / 4 (4-2) = ? My answer is 4. But some says it's 1. And arguing each others. They even using some calculators for prove them. Even those calculators showing both 1 and 4 as ...
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-...
8
votes
6answers
798 views

What we're never taught explicitly

I would like to make a complaint really. School math(s) can be the most boring way to learn: sitting down and rote learning binomial expansion or the volume of a cylinder is just not interesting. It ...
2
votes
3answers
860 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 ...
13
votes
1answer
2k views

What is the standard interpretation of order of operations for the basic arithmetic operations?

What is the standard interpretation of the order of operations for an expression involving some combination of grouping symbols, exponentiation, radicals, multiplication, division, addition, and ...
6
votes
3answers
643 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
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 ...
0
votes
1answer
2k views

Priority of parentheses and brackets in basic arithmetic.

Wolfram alpha is giving inconsistent results to this problem: When I enter: 16÷2( 8-3(4-2) )+1 the result is 17. When I enter: 16÷2[ 8-3(4-2) ]+1 the result is 5. and 16÷2*[ 8-3(4-2) ]+1 brings ...
0
votes
4answers
918 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 $$1\div (mn)(n^2) = 1 \div (mn) \times (n^2)=\frac{n^2}{mn}=\frac{n}{m}.$$ ...
-3
votes
2answers
852 views

Can $7 + 4 \times 8$ have multiple answers?

My textbook says evaluate $7 + 4 \times 8$ in a revision course. Is it $7 + 4$, then multiply by 8 or $7 + (4 \times 8)$ ? The calculator automatically gives me the correct answer, so I am going to ...
1
vote
3answers
108 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.
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?
0
votes
2answers
59 views

What the solve for this sentence?

$6÷2(1+2)=$? $6÷2\times3=9$ We need to solve first the parentheses or we can distribute this way: $6÷(2\times1+2\times2)=$? $6÷(2+4)=$? $6÷6=1$ What is the correct? $9$ or $1$?
1
vote
1answer
64 views

Ambiguity with parentheses multiplications [closed]

I was recently shown the equation $6 \div 2(1 + 2) = ?$, and it was disputed whether this equation equals $1$ or $9$. To solve for $1$: $$ 6 \div 2(1 + 2) \\ 6 \div 2(3) \\ 6 \div 6 \\ 1 $$ To ...
2
votes
1answer
97 views

Precedence of $\times$ and $\cup$.

In topology, there is a very strong need of describing subsets of some product $X\times Y$ by means of unions and products. For example, this is a very convenient way of describing subsets of the ...
1
vote
0answers
83 views

Why got multiplication and division higher priority than addition and subtraction? [duplicate]

Possible Duplicate: What is the “status” of the rule that multiplication precedes addition. I know it's some kind of axiom, that "1 + 2 * 3" is the same as "1 + (2 * 3)", but who ...
-1
votes
2answers
70 views

Order of operations for simple sum [duplicate]

6÷2(1+2)? according to PEDMAS, is it 1 or 9? Is the parenthesis operation simply the addition of 1 and two or is it only complete after multiplication?
0
votes
2answers
40 views

Basic error in order of operations [duplicate]

I know this is a very serious place to put this basic question. But I didn't find an explanation for the same. I know that $ab/ab=b^2$ for all reals with $a\neq0$. But some of my students believe ...
1
vote
1answer
47 views

How to Justify the way to solve “A / B * C”

this may be a silly (and duplicated or triplicated) question, but I don't know how justify one or other way to solve this: $A/B*C$ It is clear that: $(A/B)*C \neq A/(B*C)$ One I have heard some ...
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: $$x^{-1/3}y÷ xy^{-1/3}$$...
0
votes
1answer
24 views

Does an inline algebra expression with multiplication in the dividend imply a quantity?

Here's a trivial one. Given the inline algebra expression (2a + b) / 3c imply that the 3c is a quantity, and that the order of operations should be equivalent to (2a + b) / (3c) ? Or should it be ...
0
votes
1answer
64 views

Is 'O' in BODMAS really for 'of'?

We were trying to solve a BODMAS question (with many solutions like always) when I came across this link. https://www.mathsisfun.com/operation-order-bodmas.html For the entire life, I have studied (...