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Old 03-12-2014, 10:15 AM   #41
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Default Re: 70% of people get this wrong

7.
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Old 03-12-2014, 11:25 AM   #42
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Default Re: 70% of people get this wrong

OK, I see where many of you are getting 7. Maybe that's right. However, I'm getting 5. So this is what it comes down to.

6-0+1

If we are following order of operations PEMDAS, we add before we subtract so 0+1 is 1 leaving us with 6-1 = 5. What am I missing?

Maybe I should watch that video but in following the order of operations that is what I get.
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Old 03-12-2014, 11:27 AM   #43
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by uscjeremynca View Post
OK, I see where many of you are getting 7. Maybe that's right. However, I'm getting 5. So this is what it comes down to.

6-0+1

If we are following order of operations PEMDAS, we add before we subtract so 0+1 is 1 leaving us with 6-1 = 5. What am I missing?

Maybe I should watch that video but in following the order of operations that is what I get.
In PEMDAS, you must separate each group

PE
MD
AS

Each group is not to be taken "literally"
Meaning, PE doesnt have to be parentheses and then exponents- the order within each group of order-by is to be taken in order it occurs.

So, if an equation has exponents occurring before parentheses, then exponents are calculated first and then parentheses.

Same goes for MD; if division occurs before multiplication, then calculate the division first. The key is the groupings.
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Old 03-12-2014, 11:29 AM   #44
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Default Re: 70% of people get this wrong

5
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Old 03-12-2014, 11:39 AM   #45
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by uscjeremynca View Post
OK, I see where many of you are getting 7. Maybe that's right. However, I'm getting 5. So this is what it comes down to.

6-0+1

If we are following order of operations PEMDAS, we add before we subtract so 0+1 is 1 leaving us with 6-1 = 5. What am I missing?

Maybe I should watch that video but in following the order of operations that is what I get.
What it comes down to is this:

6-1x0+2/2

6 (1x0) + (2/2)

6 0 + 1 = 7
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Old 03-12-2014, 11:44 AM   #46
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by 3MTA3 View Post
In PEMDAS, you must separate each group

PE
MD
AS

Each group is not to be taken "literally"
Meaning, PE doesnt have to be parentheses and then exponents- the order within each group of order-by is to be taken in order it occurs.

So, if an equation has exponents occurring before parentheses, then exponents are calculated first and then parentheses.

Same goes for MD; if division occurs before multiplication, then calculate the division first. The key is the groupings.
OK that makes sense. If I were to see 6-0+1 of course I would add it from right to left and it would be 7. That's common sense.

We do this in our every day math adding and subtracting left to right so this wouldn't be an issue. However, we treat the numbers as +6, -0 (which doesn't exist), and +1 to give us 7.

I was looking at the + and - as operators and wasn't aware that these were operated as groupings.
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Old 03-12-2014, 11:47 AM   #47
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by Cockypantherfan View Post
What it comes down to is this:

6-1x0+2/2

6 – (1x0) + (2/2)

6 – 0 + 1 = 7
Yes, that part I already figured out. As I stated above, I got to the point where it is 6-0+1. Read my explanation above. I didn't need that part explained.

I completely understand 7. It makes sense. It's common sense. That's the way we would do it in our everyday math. It was a question of how to treat the operators + and - according to PEMDAS.
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Old 03-12-2014, 12:56 PM   #48
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Default Re: 70% of people get this wrong

I feel like saying I'm a visual learner is just a nice way of saying I'm slow.
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Old 03-12-2014, 01:22 PM   #49
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Default Re: 70% of people get this wrong

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Originally Posted by jellafever View Post
I feel like saying I'm a visual learner is just a nice way of saying I'm slow.
Take it that way if you want, but people learn differently.
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Old 03-12-2014, 01:30 PM   #50
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by Cockypantherfan View Post
Take it that way if you want, but people learn differently.
we're not talking about learning here- we're talking about recalling things that should be known, based on learning it in elementary school.
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Old 03-12-2014, 01:35 PM   #51
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Default Re: 70% of people get this wrong

I got 1, but I see where I was wrong.
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Old 03-12-2014, 01:49 PM   #52
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by uscjeremynca View Post
OK, I see where many of you are getting 7. Maybe that's right. However, I'm getting 5. So this is what it comes down to.

6-0+1

If we are following order of operations PEMDAS, we add before we subtract so 0+1 is 1 leaving us with 6-1 = 5. What am I missing?

Maybe I should watch that video but in following the order of operations that is what I get.
Addition and subtraction are equal, you do them left to right.
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Old 03-12-2014, 02:02 PM   #53
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Default Re: 70% of people get this wrong

I got the 13th decimal place in pi.
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Old 03-12-2014, 02:25 PM   #54
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Default Re: 70% of people get this wrong

How are you people getting seven when you subtract one from six?
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Old 03-12-2014, 02:31 PM   #55
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Default Re: 70% of people get this wrong

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Originally Posted by robgusc76 View Post
How are you people getting seven when you subtract one from six?
Read the thread- you'll get your answer.

Hint: you're doing it wrong.
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Old 03-12-2014, 02:41 PM   #56
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Default Re: 70% of people get this wrong

6-0+1 = 7

Not 6-(0+1)=5
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Old 03-12-2014, 02:45 PM   #57
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Default Re: 70% of people get this wrong

I got potatoe. Yep, potato with an "e".
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Old 03-12-2014, 02:46 PM   #58
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Default Re: 70% of people get this wrong

Quote:
Originally Posted by Thenardier View Post
Addition and subtraction are equal, you do them left to right.
Yes, that is the way we do it every single day. It's the way it is done in Excel. I completely understand the logic and why 7 is the right answer.

I was just trying to understand this from a PEMDAS order of operations perspective. This explains why it works the way it does. If they are treated as equal and Add and Subtract are grouped together as they are read from left to right, it explains why we add the way we do.
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Old 03-12-2014, 02:53 PM   #59
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Default Re: 70% of people get this wrong

1
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Old 03-12-2014, 03:10 PM   #60
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Default Re: 70% of people get this wrong

I'm baffled at the number of people who continue to get it wrong, even after it has been explained in the thread.

Maybe those who still get it wrong havent read the thread; only the first post, and responded. OK, even then- I'm baffled at the number of people who have gotten it wrong!
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