There were 128.5 tons of goods in the warehouse, and after some of them were removed, there were 97.8 tons left. How many tons of goods were removed? (column equation solution)
仓库里原有货物128.5吨，运走一部分后，还剩下97.8吨，运走货物多少吨？(列方程解答)
<gadget id="calculator">128.5 - 97.8</gadget>
<output>30.7</output>

<result>30.7</result>