问题 解答题

4+6+8+10+12+…+34+36=______.

答案

4+6+8+10+12+…+34+36,

=(4+36)+(6+34)+…+(18+22)+20,

=40×8+20,

=320+20,

=340.

故答案为:360.

问答题 简答题
问答题 简答题