Yo man u seem really really smart. i was wondering if u dont mind me

  • Thread starter Thread starter kai0ty
  • Start date Start date
  • Tags Tags
    Mind
AI Thread Summary
The discussion centers around a user admiring another's mathematical intelligence and inquiring about their educational background. The main mathematical question posed is about the order of operations in the expression "2 + 2/2," which is clarified to equal 3 due to the precedence of division over addition. The order of operations is explained using the mnemonic "Please Excuse My Dear Aunt Sally," emphasizing the sequence of operations. A misunderstanding about reading left to right is addressed, reinforcing that operations must follow the established order rather than a simple left-to-right approach. The conversation highlights the importance of understanding mathematical principles and the order of operations.
kai0ty
Messages
15
Reaction score
0
yo man u seem really really smart. i was wondering if u don't mind me asking where did u go to school and what did u major in. i love math, its fascinating, and u seem to have a very in depth understanding of it so if u don't mind could u tell me? also i don't have a question. 2+2/2 wahts the answer 2 or 3? there are no parenthesis i know that would change it.
 
Mathematics news on Phys.org
2+2/2 = 2+1 = 3

Why? Order of operations.

here's a way to remember...
Please Excuse My Dear Aunt Sally
P=Parentheses
E=Exponents
M=Multiplication
D=Division
A=Addition
S=Subtraction

In other words, first solve brackets, then parentheses, then multiplication/division, then addition/subtraction last.


In the case of "2 + 2/2"...
First: Division (2/2)
Second: Addition (2+1)

Thus, 2+2/2 = 3
 
Actually, "Hals" is my cousin. I'm "Halls"!
 
Originally posted by HallsofIvy
Actually, "Hals" is my cousin. I'm "Halls"!
You all look the same to me.

- Warren
 
ah, a typo discovered i have. mb. also i thought that you were supposed to work left to right? isn't that a rule too? maybe I am just crazy.
 
Last edited:
No, you READ left to write (well, those of us of European linguistic bent). You do operations in the defined order as Brum said. As far as you being crazy- I wouldn't presume.
 

Thread 'Trigonometry problem of interest'

Seemingly by some mathematical coincidence, a hexagon of sides 2,2,7,7, 11, and 11 can be inscribed in a circle of radius 7. The other day I saw a math problem on line, which they said came from a Polish Olympiad, where you compute the length x of the 3rd side which is the same as the radius, so that the sides of length 2,x, and 11 are inscribed on the arc of a semi-circle. The law of cosines applied twice gives the answer for x of exactly 7, but the arithmetic is so complex that the...
View full post »

Thread 'Six Pencil Puzzle'

Is it possible to arrange six pencils such that each one touches the other five? If so, how? This is an adaption of a Martin Gardner puzzle only I changed it from cigarettes to pencils and left out the clues because PF folks don’t need clues. From the book “My Best Mathematical and Logic Puzzles”. Dover, 1994.
View full post »

Similar threads

MHB Fourier Series involving Hyperbolic Functions
Replies
9
Views
4K
I Having trouble understanding a seemingly simple u-substitution
Replies
5
Views
1K
Other Engineering Physics vs Pure Physics
Replies
11
Views
3K
Is It Necessary to Substitute u in Integrals?
Replies
18
Views
3K
I What Does The Probability Density Function Tell You?
Replies
8
Views
3K
B Dividing the jewel maker's diamonds -Riddle (Easy)
Replies
2
Views
2K
Programs Help me decide: physics or chemistry?
Replies
43
Views
7K
It's me-- TK (hello Folks)
Replies
4
Views
633
Why Is Calculus Personal for Me?
Replies
4
Views
2K
Uniform Motion in 2D - A man chasing a bus
Replies
20
Views
1K

Hot Threads

Recent Insights

Back
Top