The number A is 19, and the number B is 9 greater than the opposite of A, how much greater is A than B?
甲数是19，乙数比甲数的相反数大9，甲数比乙数大多少？
<gadget id="calculator">(-19) + 9</gadget>
<output>-10</output>

<gadget id="calculator">19 - (-10)</gadget>
<output>29</output>

<result>29</result>