The sum of the numbers A and B is 16.5, and the decimal point of the number B is moved one place to the right, which is exactly equal to the number A. What is their difference.
甲、乙两数的和是16.5，乙数的小数点向右移动一位正好等于甲数．它们的差是多少．
<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<gadget id="calculator">16.5 / 11</gadget>
<output>1.5</output>

<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<gadget id="calculator">15 - 1.5</gadget>
<output>13.5</output>

<result>13.5</result>