Thread: Calculator not agreeing with text book

Hi I am working from a book and I'm having a problem.

The text below is an example from the book. When I enter this sum into my calculator exactly as shown below it says -1 not 1

For example, 3+(−4) means that (−4) is being added to 3; this is equivalent to subtracting 4 from 3, with the result (1).

What am I doing wrong? Is this an error in the book?

its an error in the book
when a greater number is substracted from a smaller one
the result is negative

I assume there is no mention of modulus of the operation? In that case you always take the positive of the computation. If there is no mention of the modulus the answer is surely negative -1.