19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?

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19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?19,15,18,18,25.9

19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?
19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?

19,15,18,18,25.9,12,15,22,5,25,15,21谁看得懂啊?
500500
第一个数“1”与倒数第一个数“1000”相加得1001,
第二个数“2”与倒数第二个数“999”相加得1001,
第三个数“3”与倒数第三个数“998”相加得1001,……
第500个数(就是500)与第501个数(就是501)相加得1001,
共有500个1001,最后结果为500×1001=500500