Thread: what is the difference between mobile and calculator?

1. what is the difference between mobile and calculator?

see these expression:
Code:
`6/2(2+1)`
on mobile, i get: 9
on calculator, i get: 1
seems that the mobile do 1st '6/2'... i belive these is wrong... but can anyone correct me?

2. Re: what is the difference between mobile and calculator?

Since there is an implied * between 2 and (2+1), it should go something like this:

6/2*(2+1) -> 6/2*(3) -> then / and * have the same priority, so working from left to right 6/2=3 and then 3*3=9

What calculator are you doing this on? On a TI-86 it evaluates to 9.

On a TI-85, 6/2(2+1) evaluates to 1, but 6/2*(2+1) evaluates to 9. I remember that the TI-85 had a bug/feature where in this exact scenario implied multiplication immediately outside parenthesis was evaluated at a higher priority than when the multiplication symbol was used. Other calculators might do the same I guess.

My suggestion to avoid ambiguity is to be verbose with symbols and include the * symbol between 2 and (2+1) and you should get the same result on all platforms that properly follow order of operations.

3. Re: what is the difference between mobile and calculator?

6/2(2+1) = 6/(4+2) = 6/6 = 1
is these correct(from what i remember)?

4. Re: what is the difference between mobile and calculator?

No.

http://mathforum.org/library/drmath/view/66676.html

Inside parenthesis are evaluated first

6/2(3)

2(3) implies 2*(3)

6/2*(3)

Division and multiplication are of equal priority and are then evaluated left to right

6/2=3, 3*3=9

5. Re: what is the difference between mobile and calculator?

If then intention is to get a response of 1 in this case, then in order for the denominator to equal 6 while following proper order of operations, and additional set of parenthesis are needed to enclose the intended denominator.

6/(2(2+1))

6. Re: what is the difference between mobile and calculator?

i must relearn again for i correct my math
i'm sorry, but can you show me step by step how resolve?
(i was reading that link.. but i'm Portuguese... maybe you resolve it, i can see better)

7. Re: what is the difference between mobile and calculator?

Your best bet would be to try to find a website that discusses Order of Operations that is in your native language. That will be more productive than anything I can offer.

8. Re: what is the difference between mobile and calculator?

now i have seen the post that you edit and the other one and from what from you said and what i read(thank you so much for the right words for i search) they match very well...
my 1st calculation wasn't my fault, but what i had learned on school... but seems that somethings was changed(i have 35 years old).
thank you so much for all... thank you

9. Re: what is the difference between mobile and calculator?

but maybe i was confused... thank you so much for correct me.. thank you

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