###### Exercise39

Itâ€™s given that \(87\cdot85=7395\text{.}\) Use this fact to calculate the following without using a calculator:

\(\displaystyle{ 8.7(-8.5) = }\)

Itâ€™s given that \(87\cdot85=7395\text{.}\) Use this fact to calculate the following without using a calculator:

\(\displaystyle{ 8.7(-8.5) = }\)