One day in December 2012, the temperature in a certain place was -13°C to -7°C, what is the temperature difference in this place on that day?
2012年12月的一天，某地的气温为-13℃～-7℃，这天该地的温差是多少℃
<gadget id="calculator">(-7) - (-13)</gadget>
<output>6</output>

<result>6</result>