2+4+8.+98+100等于几

问题描述:

2+4+8.+98+100等于几
2+4+6+8+10...............+94+96+98+100

2+4+6+8+10.+94+96+98+100
=(2+98)+(4+96)+.+100+50
=100*24+100+50
=2550