Chapter 1 - Section 1.2 - Operations with Real Numbers and Simplifying Algebraic Expressions - Exercise Set - Page 27: 15

$-4$

The addends have different signs, so to add them, perform the following steps: (1) Subtract the smaller absolute value from the bigger absolute value. $|-14|-|10| = 14-10 = 4$ (2) The sum will have the same sign as the number with the bigger absolute value. Thus, $-14+10=-4$