New Math vs. Old Math (Page 5): Way in left field. The "2(" implies multiplication, as in "2*(". Not a number you put in front of the parenthesis reduction, " 2 4".

Longshadow Loc: Audubon, PA, United States

jbk224 wrote:

8/2(2+2)=

The divisor here is not multiplication. The primary operation is (2+2)=4.
It is the 2nd numeral in the number.
So it now becomes 8/24=1/3.
If it were to be multiplied it would look like: 8/2((2+2)). (2+2=4). 8/2(4)2x4=8. 8/8=1.
The double parenthesis indicates two operations. First addition; then multiplication.
However.....modern math will calculate this as 1.

Way in left field.

The "2(" implies multiplication, as in "2*(".
Not a number you put in front of the parenthesis reduction, "24".

Longshadow Loc: Audubon, PA, United States

Guyserman wrote:

What is PDMDAS? I solve these the way my dear aunt sally taught me. My(Multiply) Dear(Divide) Aunt(Add) Sally(Subtract) got it right every time. Somewhere along the line I picked up you should resolve parenthesis first following the My Dear Aunt Sally rule inside the parenthesis. The answer is 1.

https://en.wikipedia.org/wiki/Order_of_operations#Mnemonics

bodiebill

Longshadow wrote:

Not if one goes by PEMDAS.

I am old school
What is PEMDAS?

Dannj

If we adhere to the order of PEMDAS, we would M first so: 8/2*4=8/8=1.
If we take the position that M and D are equal operations and disregard the order and go strictly left to right:
8/2*4=4*4=16.

So it seems the different answers result from strictly following PEMDAS or not.

Longshadow Loc: Audubon, PA, United States

Dannj wrote:

If we adhere to the order of PEMDAS, we would M first so: 8/2*4=8/8=1.
If we take the position that M and D are equal operations and disregard the order and go strictly left to right:
8/2*4=4*4=16.

So it seems the different answers result from strictly following PEMDAS or not.

Do not disregard the order! they are processed IN ORDER.
M is NOT FIRST! M&D are processed in the order in which they appear. Same with A & S.
Just because it's listed first in PEMDAS does not mean it is done first.

JBRIII

jbk224 wrote:

8/2(2+2)=

The divisor here is not multiplication. The primary operation is (2+2)=4.
It is the 2nd numeral in the number.
So it now becomes 8/24=1/3.
If it were to be multiplied it would look like: 8/2((2+2)). (2+2=4). 8/2(4)2x4=8. 8/8=1.
The double parenthesis indicates two operations. First addition; then multiplication.
However.....modern math will calculate this as 1.

In the language C, they have all kinds of short cuts for writing code in as little space as possible, use to have contests. Great for space saving, horrible to read, I would have hated to search for errors and good commenting would eliminate the space savings.
The last time I dealt with algebra was decades ago for a sister in law, I could show her easy ways to undestand the problem and get correct answers, but school more interested in method used than correct answer! I know methods can be important, but if the answer is wrong, the building falls, etc.

Longshadow Loc: Audubon, PA, United States

bodiebill wrote:

I am old school
What is PEMDAS?

https://en.wikipedia.org/wiki/Order_of_operations#Mnemonics

Longshadow Loc: Audubon, PA, United States

JBRIII wrote:

In the language C, they have all kinds of short cu... (show quote)

Or you wind up going to Antares instead of Jupiter.

pdsdville Loc: Midlothian, Tx

16

MrBob Loc: lookout Mtn. NE Alabama

Dannj wrote:

If we adhere to the order of PEMDAS, we would M first so: 8/2*4=8/8=1.
If we take the position that M and D are equal operations and disregard the order and go strictly left to right:
8/2*4=4*4=16.

So it seems the different answers result from strictly following PEMDAS or not.

THANK YOU Dan.... This is what I have been looking for from the beginning.... DO NOT ASSUME ! This was the entire point of the exercise.

aammatj Loc: Zebulon, NC / Roscoe, Ill

1

Po1949

one

Po1949

1

JFCoupe Loc: Kent, Washington

1 in my calculation
(2+2)=4
4 x 2 = 8
8/8= 1

Minitman Loc: Centreville, Virginia

One