Multiplying Integers
Solve each of the following.

911=\displaystyle {9}\cdot{11}= (9)11=\displaystyle {\left(-{9}\right)}\cdot{11}=
9(11)=\displaystyle {9}\cdot{\left(-{11}\right)}= (9)(11)=\displaystyle {\left(-{9}\right)}\cdot{\left(-{11}\right)}=