Chapter 1 - Foundations for Algebra - 1-6 Multiplying and Dividing Real Numbers - Practice and Problem-Solving Exercises - Page 44: 75

-10

A key rule to remember is that subtracting a negative is the same as addition. Thus, we obtain: $-37-(-27)=-37+27$ We must also recall that a negative becomes more positive when a positive number is added to it. Thus, we obtain: $-37+27=-10$