Number A is 0.45 less than Number B. If you add Number A and Number B, the sum is 0.85. What is Number B?
甲数比乙数小0.45，如果将甲数和乙数相加，和是0.85，乙数是多少
<gadget id="calculator">0.85 + 0.45</gadget>
<output>1.3</output>

<gadget id="calculator">1.3 / 2</gadget>
<output>0.65</output>

<result>0.65</result>