Complete the following exercise:7⋅3= 7\cdot3= 7⋅3=
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:
+7×+3=+21 +7\times+3=+21 +7×+3=+21
21