Mom bought 20 apples, the whole family ate 7 for the first time, and 5 for the second time. How many apples did you eat in total?
妈妈买来20个苹果，全家第一次吃了7个，第二次吃了5个．两次一共吃了多少个苹果？
<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<result>12</result>