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.
4+6+8+10+12+…+34+36=______.
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.