Complete the following exercise:1⋅(−1)= 1\cdot(-1)= 1⋅(−1)=
Let's remember the rule:
(+x)×(−x)=−x (+x)\times(-x)=-x (+x)×(−x)=−x
Therefore, the sign of the exercise result will be negative:
+1×−1=−1 +1\times-1=-1 +1×−1=−1
−1 -1 −1