On a certain day, the average daily temperature in Beijing is -5°C, and the average daily temperature in Shanghai is 10°C, what is the difference in average temperature between the two places on that day?
某天，北京的日平均气温为-5℃，上海的日平均气温为10℃，则这天两地的平均气温差为多少℃．
<gadget id="calculator">10 - (-5)</gadget>
<output>15</output>

<result>15</result>