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5+5+5-5+5+5-5+5*0=

5 + 5 + 5 - 5 + 5 + 5 - 5 + 5 x 0 = ?

  • Total voters
    264
Haha, totally should have finished seeing the sequence before voting and I wouldn't have assumed there was a parenthesis. :eek:

5+5+5-5+5+5-5+5*0=
5+5+5-5+5+5-5+ (5*0)=
5+5+5-5+5+5-5+0= 15

Unless I miscounted somewhere, I see 7 5s not being multiplied by 0. 5 of them are positive 5 and 2 of them are negative 5.
 
15.

5+5+5-5+5+5-5+5*0=
5+5+5-5+5+5-5=
5+5+5=15

mscriv said:
I voted 15 because that makes sense using PEMDAS and working left to right. Does left to right come into play with calculations? I don't know, grade school math was so long ago. However, puma1552's post below makes sense as well depending upon how you apply PEMDAS if it's not left to right. I don't remember the rule.
Click to expand...
You use PEMDAS, but if you have more than one of the functions, you'll simplify whichever is first.
 
Really depends on how you group them.

Let f(x) = (5+5+5-5+5+5-5+5)
and let g(x) = 0

f(x) * g(x) = 5+5+5-5+5+5-5+5 * 0 = 0.



And if f(x) = 5+5+5
and if g(x) = 5+5+5
and h(x) = 5+5

And the problem is asking f(x) - g(x) - h(x) * 0 = f(x) - g(x) = 5+5+5 - (5+5+5) = 0

....grouping really matters.


I answered 15.
 
The answer is 0.

For those of you adding to the equation - you can't arbitrarily put a parenthetical logic when none exist.
 
Last edited:
Papanate said:
Math logic 101 - There are no parenthesis in the original equation - so it is a matter of left to right addition, subtraction and multiplication.


It's a vastly different equation if you add any bits to it.
Click to expand...

Math logic 101A: When you have addition/subtraction/multiplication/division, you first do * or /, left to right, and then +/-, left to right. makes all the difference in the world.
 
It's 15

PEMDAS (Parenthesis, Exponents, Multiply,Divide,Add,Subtract)

Then Left to Right

Don't believe me? Type it in the google search box and see what it returns.
 
i asked siri
6bf39a60.jpg
 
Papanate said:
There are no parenthesis in the original equation - so it is a matter of left to right addition, subtraction and multiplication.
Click to expand...

Yes, left to right, following BODMAS:

  • Brackets
  • Of
  • Division
  • Multiplication
  • Addition
  • Subtraction

It is really simple. You do the multiplication first, and then the addition and subtraction. There is NO parenthesis in the equation and therefore, that does not apply.
 
puma1552 said:
-5

5+5+5-5+5+5-5+5*0

PMDAS order of operations, Parentheses, Multiplication, Division, Addition, Subtraction

Grouping terms according to order of operations reduces to

(5+5+5)-(5+5+5)-[5+(5*0)]
=15-15-5+0
=-5
Click to expand...

If you're going to do that, it should be:

(5+5+5)+(-5+5+5)+[-5+(5*0)]
=(15)+(5)+(-5)
=15

.
 
Mac'nCheese said:
Math logic 101A: When you have addition/subtraction/multiplication/division, you first do * or /, left to right, and then +/-, left to right. makes all the difference in the world.
Click to expand...

I don't disbelieve anyone about the answer they are arriving at.
And I don't disagree with using PEMDAS exactly.

But I'm a literalist.
IOW's if it ain't there it ain't there. And to me
PEMDAS assumes functions that aren't written; And
likewise I say the function has to be written to be used.

Otherwise every equation is open to interpretation.
 
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