The school bought 2,500 sheets of blank paper, used 335 sheets in March, and used 665 sheets in April. How many sheets are left?
学校买来2500张白纸，三月分用去335张，四月分用去665张，还剩下多少张？
<gadget id="calculator">2_500 - 335 - 665</gadget>
<output>1_500</output>

<result>1_500</result>