The number A is 10.9, which is 0.82 more than the number B. What is the sum of the two numbers A and B?
甲数是10.9，比乙数多0.82，甲、乙两数的和是多少．
<gadget id="calculator">10.9 - 0.82</gadget>
<output>10.08</output>

<gadget id="calculator">10.08 + 10.9</gadget>
<output>20.98</output>

<result>20.98</result>