1+2+3+4+5+······+100的过程和结果?

2024-12-26 21:47:26
推荐回答(2个)
回答1:

等差数列

S=100+100(100-1)/2=5050

回答2:

1+100 = 101
2+99 = 101
3+98 = 101
……
49+52 = 101
50+51 = 101
1+2+3+4+5+······+100=101 x 50 = 5050