If you lose \($75\) per year, calculate the total debt over \(10\) years.

\((-75)\) represents a loss of \($75\) per year.

Solve using addition:

\((-75)+(-75)+(-75)+(-75)+(-75)+(-75)+(-75)+(-75)+(-75)+(-75)\)

Instead, solve using multiplication:

\(10 \times (-75)\)

But how do we solve a multiplication problem involving negative integers?

• Multiply integers when one integer is positive and the other integer is negative.
• Multiply integers when both integers are negative.