Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.4 - Integers: Multiplication and Division - Problem Set 1.4 - Page 27: 94

The answer is below.

The student accidentally did the following: $$-6 + (-8) \div 2 \\ 54 / 2 =27$$ First of all, the student thought that the addition symbol was a multiplication symbol. Then, they incorrectly multiplied 6 and 8 to get 54. Here is how you do it correctly: $$ = -6 + (-4) \\ -10$$ Note, it is important to divide the -8 by two before performing addition.