0.01+0.02+0.03…+0.97+0.98+0.99=(0.01+0.99)+(0.02+0.98)+....=1+1+1+...+0.5=49x1+0.5=49.5
望采纳
先乘以100
那么就是1+2+3+.....+98+99
=99*(99+1)/2=4950
=(0.01+0.99)×99÷2
=1×99÷2
=49.5
0.01+0.99=1,0.02+0.98=1,0.03+0.97=1,......,0.48+0.52=1,0.49+0.51=1,一共49个1和1个0.5,一共是49+0.5=49.5
答:原式等于49.5
49.5