Question

How do you evaluate `−7 − 8`?

Answer 1

`-15` is the answer.

Explanation:

You are subtracting. So -7-8 gives us `-15`

Answer 2

Most likely: `color(red)(-15)`
Alternate possibility: `color(blue)(+1)`

Explanation:

In general PEDMAS is normally specified as being evaluated from left to right (when operations are at the same level).
Therefore `-7-8`
would be evaluated as `color(red)(((-7)-8)=-15)`

However, I have encountered some computer programming languages/environments that claim to be PEDMAS but which evaluate right to left,
in which case `color(blue)(-7-8=(-(7-8))=(-(-1))=+1)`