The canteen shipped 550 kilograms of rice for the first time, 50 kilograms more than the second time. How many kilograms of rice did they buy in total?
食堂第一次运进大米550千克，比第二次多50千克，两次一共买进大米多少千克？
<gadget id="calculator">550 - 50</gadget>
<output>500</output>

<gadget id="calculator">500 + 550</gadget>
<output>1_050</output>

<result>1_050</result>