4th and 5th grade collect tree species. The fifth grade collected 24.5 kg, 1.6 kg less than the fourth grade. How many kilograms of tree species were collected in the fourth and fifth grades?
四、五年级采集树种．五年级采集了24.5千克，比四年级少采集1.6千克．四、五年级一共采集多少千克树种？
<gadget id="calculator">24.5 + 1.6 + 24.5</gadget>
<output>50.6</output>

<result>50.6</result>