125+126+127+128+······+221+222+223等于多少怎样算？

125+126+127+128+······+221+222+223等于多少怎样算？ 128*73/127+2.6 怎样简算?绝不会少······ 126+128+130+···+400的值是多少 126+128+130···+400 = 多少? 有沒有簡便 -128,64,-32,16,-8,4,-2,1,-½,···第n个数是急需··················· 125*（ ）/3*8-10=1990 括号里填几守护甜心守护甜心守护甜心····································这只是为了引起大家注意，跟守护甜心没关系， ···· · · · ···· ·········· ·········· 求··············· 什么植物有应激性只要植物名 ········································································································· 急·························· 急 ··············急············ 这是什么蛾类昆虫?如题请给予回答···········································································