On a winter day last year, the temperature in Lishui was -3°C to 10°C. What is the temperature difference in Lishui on this day?
去年冬日一天，丽水的气温为-3℃～10℃，这一天丽水的温差是多少℃．
<gadget id="calculator">10 - (-3)</gadget>
<output>13</output>

<result>13</result>