There are 600 copies of a new book in Xinhua Bookstore, 190 copies are sold in the morning, and 240 copies are sold in the afternoon. How many copies are left?
新华书店的一种新书有600本，上午卖出190本，下午卖出240本，还剩下多少本？
<gadget id="calculator">190 + 240</gadget>
<output>430</output>

<gadget id="calculator">600 - 430</gadget>
<output>170</output>

<result>170</result>