Liangliang and grandma saved 260 yuan in September, and saved 30 yuan less in October than in September. How much yuan did they save in two months?
亮亮和奶奶九月节余260元，十月比九月少节余了30元，两个月一共节余了多少元？
<gadget id="calculator">260 - 30</gadget>
<output>230</output>

<gadget id="calculator">230 + 260</gadget>
<output>490</output>

<result>490</result>