The sum of two addends is 16.3, one of which is 4.8, and what is the other addend.
两个加数的和是16.3，其中一个加数是4.8，另一个加数是多少．
<gadget id="calculator">16.3 - 4.8</gadget>
<output>11.5</output>

<result>11.5</result>