# My android calculator shows 6÷2 (2+1)=9.

• 08-08-2017, 08:47 PM
AC Question
My android calculator shows 6÷2 (2+1)=9.
My android calculator fails to preform basic math order of operations. Is there a fix for this? This is the built in calculator for the Galaxy S6
• 08-08-2017, 09:12 PM
anon(9602380)
Re: My android calculator shows 6÷2 (2+1)=9.
Welcome to Android Central.

I'm no math genius but I don't see what the problem is. The answer is 9. Please correct me if I'm wrong. Thanks.
• 08-08-2017, 09:26 PM
Mooncatt
Re: My android calculator shows 6÷2 (2+1)=9.
The order of operations ranks multiplication and division on the same level. Same goes for addition and subtraction. When you have both in an equation like this, you run them left to right. So:

6÷2x(2+1)=
6÷2x3=
(6÷2)x3=
3x3=9

So your calculator is correct, though I think I have seen at least one physical calculator get the order of operations wrong. For more info http://www.purplemath.com/modules/orderops.htm
• 08-09-2017, 06:11 AM
belodion
Re: My android calculator shows 6÷2 (2+1)=9.
I bet the answer is 1😠.
Whether it's 1 or 9, these things are very annoying, because there should be no possible room for doubt. Mathematicians must improve things accordingly😡.
• 08-09-2017, 08:57 AM
Tim1954
Re: My android calculator shows 6÷2 (2+1)=9.
It's 42.....
• 08-09-2017, 11:14 AM
Mooncatt
Re: My android calculator shows 6÷2 (2+1)=9.
6 divided by 2, OK, but what does the 2+1 in brackets signify again? It's been decades for me (tens of years).
Help me out.
The parts in parenthesis (or brackets, depending on your terminology) always get performed first according to the order of operations.
• 08-09-2017, 11:42 AM
Rukbat
Re: My android calculator shows 6÷2 (2+1)=9.
Values inside parentheses are evaluated before anything else, so 2+1=3. Then 6/2=3 * 3=9.
• 08-09-2017, 12:14 PM
Mooncatt
Re: My android calculator shows 6÷2 (2+1)=9.
Ah. The OP didn't put multiply (x) before the parentheses, but I take it parentheses signifies multiplication anyway?
Correct.

2(2+1) is the same as 2x(2+1)
• 08-09-2017, 12:27 PM
Mooncatt
Re: My android calculator shows 6÷2 (2+1)=9.
.... and finally, regarding the \$2 in my pocket, the fastest way to convert that into a million bucks is?
:D
Plant it in fertile soil and water daily until it sprouts a money tree.
• 08-09-2017, 01:07 PM
Mooncatt
Re: My android calculator shows 6÷2 (2+1)=9.
LOL. Brilliant!

... although probably not the quickest [emoji14]
True, but probably have about the same chance of success as winning the lottery. [emoji14]
• 08-09-2017, 01:27 PM
Rukbat
Re: My android calculator shows 6÷2 (2+1)=9.
Ah. The OP didn't put multiply (x) before the parentheses, but I take it parentheses signifies multiplication anyway?
Normally it's multiply/divide followed by add/subtract (it doesn't matter which of the pair comes first, the answer will be the same), but if you want 2 numbers added before the result is used, you have to use parentheses. 6÷2 (2+1) normally would be a/2 or 2*2 first, then the rest of the multiplication/division, then the addition. But that's not what's indicated by 6÷2 (2+1).

Remember - My Dear Aunt Sally - Multiplication, Division, Addition, Subtraction, but exponentiation before any of them and calculations inside parentheses are done before being used outside the parentheses.
• 08-09-2017, 02:01 PM
ManiacJoe
Re: My android calculator shows 6÷2 (2+1)=9.
calculator app says 6÷2 (2+1)=9
Given the notation of "2()", I don't recall if that grouping is supposed to equal "(2 x ())" for a higher precedence than the normal multiply-divide.

My LG G4 calculator automatically puts in the multiply operator between the 2 and ( thus solving the ambiguity, but not necessarily solving it correctly.
• 08-09-2017, 10:04 PM
anon(9602380)
Re: My android calculator shows 6÷2 (2+1)=9.
Well there sure are some smarty pants in this crowd! :D
• 08-09-2017, 10:20 PM
Golfdriver97
Re: My android calculator shows 6÷2 (2+1)=9.
That's what I was trying to remember. Thanks a lot!

.... and finally, regarding the \$2 in my pocket, the fastest way to convert that into a million bucks is?

:D
I've heard that the best way to double your money is to fold it in half and put it in your pocket.