It is known that the highest temperature in a day in a certain place is 10°C, and the lowest temperature is -5°C, what is the temperature difference in that day?
已知某地一天中的最髙温度为10℃，最低温度为-5℃，则这天的温差为多少℃．
<gadget id="calculator">10 - (-5)</gadget>
<output>15</output>

<result>15</result>