(113+115+117+···+191）-（112+114+116+···+190）=

来源：学生作业学帮网编辑：学帮网时间：2024/06/01 08:57:39

规律：113-112+1,115-114=1,……
所以原式=1+1+1+……+1=39

=(-112+113)+(-114+115)+(-116+117)……+（-190+191）=1+1+1+……+1=40

(113+115+117+···+191）-（112+114+116+···+190）= 39
去括号113+115+117+···+191-112-114-116-···-190
=113-112+（115-114）+···+（191-190）
=1+1+1+···+1
=39

(113+115+117+···+191）-（112+114+116+···+190）= 112+113+114+115+116+117+118+119+120...+190+191得数是几? 199+195+191+···+3等于? ···· · · · ···· ·········· ·········· 113+114+115+116+117=几求··············· 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··········································································· 写一个关于动物的拟人句急急急呀······································································································ 怎样计算摩尔质量?要详细啊·························································