On a certain day, the temperature forecast in Beijing is -3°C to -5°C, what is the maximum temperature difference in this day?
某一天，北京预报的气温是-3℃～-5℃，这一天的温差最大是多少℃．
<gadget id="calculator">(-3) - (-5)</gadget>
<output>2</output>

<result>2</result>