What’s the answer?!

[utaninja]

Sorry, but your grandfather is incorrect, and please don't quote his certified math stuff because I'd fire back.

The correct answer is 9. If you'd like further explanation on this please let me know.

You can ask a higher up math teacher the question. They teach you to go left to right in younger grades, but you don't really have to. Just ask your teacher.

 

[Maddy]

You can ask a higher up math teacher the question. They teach you to go left to right in younger grades, but you don't really have to. Just ask your teacher.

That doesn’t make sense.
In theory if you have 1+2-3
If you read it left to right, you get (1+2)-3=0
Read it right to left, you get
(3-2)+1=2
So it has to be one way or the other, I was always taught “in the order they appear” and they appear left to right. The question would be rewritten a different way if they want you to solve it a different way. So the answer should be 9.

 

[Blood]

That doesn’t make sense.
In theory if you have 1+2-3
If you read it left to right, you get (1+2)-3=0
Read it right to left, you get
(3-2)+1=2
So it has to be one way or the other, I was always taught “in the order they appear” and they appear left to right. The question would be rewritten a different way if they want you to solve it a different way. So the answer should be 9.

I agree but this is a bad example since you made an error in your right to left expression. You have +2 not -2. Reading right to left will still get you the same answer. A better example is 1-2+3.
Left to right: (1-2)+3 = 2
Right to left 1-(2+3) = -4
utaninja The order does matter when subtraction comes before addition or division comes before multiplication.
16 * 2 / 4 = 8 (does not matter what order you do because (16*2)/4=8 and 16*(2/4)=8)
16 / 2 * 4 = 32 (does matter what order because (16/2)*4=32 but 16/(2*4)=2)

 

[Maddy]

I agree but this is a bad example since you made an error in your right to left expression. You have +2 not -2. Reading right to left will still get you the same answer. A better example is 1-2+3.
Left to right: (1-2)+3 = 2
Right to left 1-(2+3) = -4
utaninja The order does matter when subtraction comes before addition or division comes before multiplication.
16 * 2 / 4 = 8 (does not matter what order you do because (16*2)/4=8 and 16*(2/4)=8)
16 / 2 * 4 = 32 (does matter what order because (16/2)*4=32 but 16/(2*4)=2)

I see where you’re coming from, yeah.

 

[User]

This sounds more of a regional problem more than a math problem to me -

Americans are taught our own math - we use inches, feet, yards, and miles and we're taught PEMDAS

From what I can take, majority use the metric system - nanometer, millimeter, centimeter, meter, kilometer and are taught BIMDAS or BIDMAS whatever.

metric system has nothing to do with is and bidmas = pemdas

 

[Maddy]

metric system has nothing to do with is and bidmas = pemdas

Am I the only one in this whole convo who learned it as bedmas

 

[User]

Am I the only one in this whole convo who learned it as bedmas

possibly? are you from australia/canada? america has pemdas and eu has bidmas

 

[Maddy]

possibly? are you from australia?

No. Canada, says it in my bio

 

[User]

No. Canada, says it in my bio

ah, that could be why

 

[Maddy]

No. Canada, says it in my bio

Australians say it “samdeb”

 

[User]

Australians say it “samdeb”

ewwww
oh wait i get it LOL

 

[Aekalix]

The answer is easy if you look at it like that.