Chapter 2 - Section 2.4 - Multiplying and Dividing Integers - Exercise Set - Page 131: 138

To get the result of $A\times B$, Firstly calculate $|A|\times |B|$, then put a negative sign in front of the result if A and B have different signs, and a positive sign in front of the result if A and B have the same sign.

To get the result of $A\times B$, Firstly calculate $|A|\times |B|$, then put a negative sign in front of the result if A and B have different signs, and a positive sign in front of the result if A and B have the same sign.