1+2+3+4+5......+987+988=?
987除以987又988分之987=
1+2+3+4+5.+1000=?
1X8+1=9,12X8+2=98,123x8+3=987,1234x8+4=9876找规律把下面,□填上数字
1x8+1=9,12x8+2=98,123x8+3=987,1234x8+4=9876照样子继续
1-2+3-4+5...+99-100+101=?
1+2+3+4+5...+9999+10000=?
1+2+3+4+5......+97+98+99+100=?
987÷988又1/986+999又1/997*997/998简算
1*8+1=9;12*8+2=98;123*8+3=987你能发现什么规律
1*8+1=9 12*8+2=98 123*8+3=987 9*9-1=80 98*9-2=880 987*9-3=88
1x8+1 =9 12x8+2=98 123x8+3=987 9x9-1=80 98x9-2=880 987x8-3=8
C语言编程,s=1+1/2-1/3+1/4-1/5.+1/n,