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WHEN DO YOU NEED TO USE PEMDAS, DO YOU USE IT EVEN THROUGH YOU DON'T HAVE PARENTHESES OR EXPONENTS

I need help solving this problem

1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1*0

 there are 10 ones infront  of the minus sign and 6 ones after the minus sign

  I belive the answer is 14 or -6 or 5 please help me

also need to know if I need to use PEMDAS for every math problem even if it doesn't have parentheses

 

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3 Answers

Incorrect Brian.... the multiplication step clears first before adding or subtracting any numbers.

No, you would only multiply the last 1 by zero, as you do multiplication first, by PEMDAS. Then, you would add  or subtract the remainder of the ones.

To answer the question, you would use PEMDAS to answer any math question, especially if there are no parentheses. 

Here is the original:
1+1+1+1+1+1+1+1+1+1-1+1+1+1+1+1*0

Here, I add my own parentheses, according to PEMDAS:

(1+1+1+1+1+1+1+1+1+1)-1+ (1+ 1+1+1) +1*0

The last phrase = 0, and we evaluate it first, because it's multiplication, so:

(1+1+1+1+1+1+1+1+1+1)-1+ (1+ 1+1+1) + 0

The first phrase =  10, because we're just adding 10 ones together, so:

(10) - 1 + (1+ 1+1+1)

Now, adding the last phrase, since I put it in parentheses:

(10) - 1 + (4)

Now, combine the first two terms:

9 + 4

And then add:

13

Unless there is a typo here, you have a trick question.  Note you have plus and minus signs until the zero.  There appears to be a multiplication sign in front of the zero.  If that's correct, the answer is zero as you just multiplied the entire problem by zero.