(2+4+6+8+10+12.+100)-(1+3 - 知识问答

(2+4+6+8+10+12.+100)-(1+3+5+7+9+11...

1个回答

(2+4+6+8+10+12.+100)-(1+3+5+7+9+11...+99)
=2+4+6+8+10+12.+100-1-3-5-7-11-99
=(2-1)+(4-3)+(6-5)...+(100-99)
=1+1+1+1+1+1+...+1
=50×1
=50
有疑问追问!

相关问题