(i) The contrapositive of the given assertion is as per the following

On the off chance that something doesn’t have low temperature, it isn’t cold.

The opposite of the given assertion is as per the following

In the event that something is at low temperature, it is cold.

(ii) The contrapositive of the given assertion is as per the following

Assuming you realize how to reason deductively, you can fathom math.

The opposite of the given assertion is as per the following

Assuming you don’t have a clue how to reason deductively, you can’t grasp calculation.