The canteen of Zhanhui International Experimental School plans to transport 345 tons of coal, 135 tons last month, and another 110 tons this month, and the rest will be shipped within this week. How many tons of coal will be shipped this week? (answer in two ways)
展辉国际实验学校食堂计划运进345吨煤，上个月运进135吨，这个月又运进110吨，剩下的打算在这星期内全部运完，这个星期要运多少吨煤？(用两种方法解答)
<gadget id="calculator">135 + 110</gadget>
<output>245</output>

<gadget id="calculator">345 - 245</gadget>
<output>100</output>

<result>100</result>