Complete the following exercise:
2⋅1= 2\cdot1= 2⋅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 positive:
+2×+1=+2 +2\times+1=+2 +2×+1=+2
2 2 2