Chapter 1 - Some Basic Concepts of Arithmetic and Algebra - 1.5 - Use of Properties - Problem Set 1.5 - Page 33: 25

$-338$

We start with the given expression: $15(-14)+16(-8)$ Since there is no common factor here, we are unable to use any of the properties to help us simplify. Instead, we must follow the order of operations. First, we multiply from left to right: $-210+16(-8)=-210+(-128)$ Next, we add: $-338$