Let us touch off a fire storm

Discussion in 'Random Discussion' started by valis, Aug 14, 2019.

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Anyone?

8/2(2+2)

I solve and get 'buick' but my math may be off.

2. lochlomonder

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I know this is driving people nuts, valis

I would argue the answer is 1, using the BODMAS acronym we were taught at school, i.e. Brackets Out, Divide, Multiply, Add, Subtract.

Accordingly 8/2(2+2)
= 8/2(4)
= 8/8
=1

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3. Johnny b

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Using the math I learned about 65 years ago...... 1

But things change.

Here's one I heard while in a university calculus class I'll never forget.
One of the students ( not me ) argued that multiplying by 1/2 was not the same as dividing by 2.
The prof didn't find it very funny

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And on this side of the pond, we use PEMDAS...Which returns 16...

This crap is why I was an English major...

5. Johnny b

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Sorry, I don't see it.
Could you go step by step for an explanation ( beyond an acronym)

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Parentheses first, then ecponents, muliplication, division, addition, subtraction. PEMDAS.

So 8/2(2+2)
8/2(4)
4(4)
16

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There is a member here whom I grew up with, and is arguably one of the smartest humans I have met, and he returned 16 as well....as did my son.

Whom, by the way, started high school today. Holy crap.

8. Johnny b

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8/2(2+2)
8/2(4)
OK
But it's 8 divided by the sum of 2 times (2+2)

New math

It depends upon changing the meaning of the ( )

http://www.math.harvard.edu/~knill/pedagogy/ambiguity/index.html

9. Johnny b

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I was never taught PEDMAS or BODMAS.

Just math LOL!

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It bugs me greatly that there are multiple correct answers for this, depending on what one was taught. Math is math; 2 and 2 should ALWAYS equal 4.

11. Johnny b

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To get '16'

I would write it:

edit: on second thought (8/2) * (2+2)

It separates functions to be carried out independently.

Does this bother me?
No.
It's not an issue of 2 correct answers, it's an issue of divergent definitions of how functions are displayed.

Last edited: Aug 14, 2019
12. Johnny b

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1 divided by 1/2 = 1 * 2

Just math.

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I hate seeing this in my FB feed... lol

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8/2 " (2+2) is redundant. It is the same as the original statement, the " is unneccessary.

15. Johnny b

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For you it is, for me it isn't.
Note, I edited the formula just before you posted.

8/2(2+2) in my world, is 8 divided by the sum of 2 *( 2+2)

In your's....well....

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