Expert Answers
lemjay eNotes educator| Certified Educator

To simplify this, apply order of operation PEMDAS.

In the given expression, the operations present are divide and subtract.

As per PEMDAS, division should be perform before subtraction.So it becomes:

`18/-3-5`

`=-6-5`

Then, do subtraction. To subtract -6 and 5, which have unlike signs, change the sign of the second number to its opposite. And change the operation from subtract to add.

`=-6+(-5)`

`=-11`

Therefore,  `18/-3-5 = -11` .

agnetthomas | Student

You can also apply the BODMAS rule.According to it,

  1. Division should be performed first,that is 18/-3 which gives you -6.
  2. Then,proceed to to the next operation which is subtraction,that is
    -6-5 .As both are negative,add them both and put negative sign,which means -(6+5)=-11

  3. Hence,the final answer is -11.
aishukul | Student

To solve 18/-3 -5, first you should divide the fraction by the rule of PEMDAS:

`18/-3`

`=-6.`

Then you subtract:

`-6-5 `

`=-11.`

-11 is the final answer.

atyourservice | Student

18/-3-5

 just in case you mean `(18)/(-3-5)` I'll do that one for you.
 
The first thing you must do is solve the denominator:
-3 - 5 = -8
therefore the problem is:
 
`(18)/(-8)`
which is equal to:
 
 
` (18)/(-8) = -2.25`
 

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