On December 28 last year, the weather forecast for Yugan was -5°C-11°C. What is the temperature difference between the highest and the lowest temperature on that day?
去年12月28日天气预报余干-5℃-11℃，那么当天最高和最低的温差是多少℃．
<gadget id="calculator">(-5) - (-11)</gadget>
<output>6</output>

<result>6</result>