Question

简便运算，请大师解！！答出采纳！

Answer 1

31/5+32/5+33/5+34/5+35/5
=1/5*(31+32+33+35)
=1/州拿漏5*(31+35)*4/2
=1/册烂5*33*4
=26.4
9999*9998-9998*9997-9997*9996+9996*9995
=9998*(9999-9997)-9996*(9997-9995)
=2*(9998-9996)
=2*2
=4
6000-1-3-5-……-97-99
=6000-(1+3+5+……+97+99）
=6000-（1+99）*50/2
=6000-2500
=3500
100-98+96-94+92-90+……+8-6+4-2
=(100-98)+(96-94)+(92-90)+…敏宽…+(8-6)+(4-2)
=2*25
=50

Answer 2

31/迟磨5 + 32/码带斗5 + 33/5 +34/5 + 35/5 = (31+32+33+34+35)/5 = 165/5 = 33

6000-1-3-5-...-99 = 6000 - (1+3+5+...+99) = 6000 - （1+99）行肆*25 = 6000 - 2500 = 3500