The number A is 4.8, which is 1.9 more than the number B. What is the sum of the numbers A and B? What is the correct formula?
甲数是4.8，比乙数多1.9，甲、乙两数之和是多少，列式正确的是多少
<gadget id="calculator">4.8 - 1.9</gadget>
<output>2.9</output>

<gadget id="calculator">2.9 + 4.8</gadget>
<output>7.7</output>

<result>7.7</result>