On Sunday, Xiaohong had guests at home, and she helped her mother get ready. She is responsible for boiling water, washing teacups, and wiping the floor. It takes 10 minutes to boil water, 5 minutes to wash teacups, and 8 minutes to wipe the floor. How many minutes does it take her at least to do these things!
星期天，小红家里本客人，她帮妈妈做准备．她负责烧开水，洗茶杯，擦地，其中烧开水要用10分钟，洗茶杯要用5分钟，擦地要用8分钟，她至少要用多少分钟才能干完这些事！
<gadget id="calculator">8 - 10</gadget>
<output>-2</output>

<gadget id="calculator">10 + 5 + (-2)</gadget>
<output>13</output>

<result>13</result>