Math Test

[Sylvain]

Neuf.

Let me google that for you

 

[Colinb913]

9.

 

[cmj]

Here it is in three forms. Each of which is used by many mathematicians, engineers, and developers.

Each method I input the expression in the original form

Google

Python

C

If these compilers are incorrect, then everything we do, use, and think is incorrect and YOU sir Math teacher need to start publishing. (just a fun jab, no disrespect)

 

[cmj]

The moral of the story is this: Make sure your notation is specific.

 

[Sylvain]

Also if Bunny were to ask me that question in person I would probably just punch him in the face as I hate math.

 

[Naptown]

9

 

[kyotekilr]

I agree the notation sucks. the true problem is the division sign. 2(2+1) is a term. the division sign literally means 6/2(2+1). If the problem stated 6/2+(2+1), 2+(2+1) is two terms and in this case you would 3+(2+1).

you put in the computer wrong. you are "dividing" by 2 and then multiplying by 3 however the correct notation should be "dividing" by 2 and "dividing" by 3

if the problem was 6 divide 2x you would not divide by 2 and then multiply by x you would write it as a quotient 6/2x

 

[ATM]

...When you see division you multiply by the reciprocal.

OK, let's try that. 6 * 1/2 * 3 = ?

Hmm... I still get 9.

 

[cmj]

I agree the notation sucks. the true problem is the division sign. 2(2+1) is a term. the division sign literally means 6/2(2+1). If the problem stated 6/2+(2+1), 2+(2+1) is two terms and in this case you would 3+(2+1).

you put in the computer wrong. you are "dividing" by 2 and then multiplying by 3 however the correct notation should be "dividing" by 2 and "dividing" by 3

if the problem was 6 divide 2x you would not divide by 2 and then multiply by x you would write it as a quotient 6/2x

Let's agree to disagree. I will also agree that I am correct and YOU are correct.. But I am more so!

If you are teaching 4th graders, the use of 'implied' multiplication is acceptable. When you are using math in real world applications there is no such thing.

For the last time, 9 is correct when taking the notation literally (as you should), BUT the notation is too ambiguous and this debate will loom forever and no one will ever be able to prove with certainty that they are correct.

Except I am certain that I'm correct

 

[kyotekilr]

2(2+1) is a term. If the problem stated 6 divide 2x you would not divide by two and then multiply by x, you would write it as a quotient 6/2x. it is the same thing here just x=(2+1)

 

[kyotekilr]

there is no law in mathematics that says you have to work from left to right. you put it in the computer wrong 2(2+1) is one term

 

[cmj]

there is no law in mathematics that says you have to work from right to left. you put it in the computer wrong 2(2+1) is one term

You are mistaken tho, The original problem does not notate it as a single term. 2(2+1) without clarification is the same thing as 2*(2+1).. Neither of us are incorrect, It's the notation!

 

[kyotekilr]

to associate the 6 and 2 it would need parenthesis. No offense but you are not reading it literally.

 

[cmj]

The REAL culprit is IMPLIED MULTIPLICATION

 

[kyotekilr]

2*x=2x both are terms in the case of this problem x=(2+1)

 

[kyotekilr]

2+1 is not a term. hence the need for parenthesis

 

[ATM]

there is no law in mathematics that says you have to work from left to right...

Not a law, a rule.

When laws are broken, someone goes to jail (math prison in this case).

When rules are broken, you just get the wrong answer and may be asked to leave. (If you do not leave when asked, you may be arrested for math trespass, which is a law.)

 

[Sylvain]

Not a law, a rule.

When laws are broken, someone goes to jail (math prison in this case).

When rules are broken, you just get the wrong answer and may be asked to leave. (If you do not leave when asked, you may be arrested for math trespass, which is a law.)

Do you OC your calculator like that?

 

[LANShark42]

42

 

[kyotekilr]

Not a law, a rule.

When laws are broken, someone goes to jail (math prison in this case).

When rules are broken, you just get the wrong answer and may be asked to leave. (If you do not leave when asked, you may be arrested for math trespass, which is a law.)

True it is not a law