1992+1998+2000+1998+2001+2005+1999+1998
来源:学生作业帮 编辑:搜狗做题网作业帮 分类:数学作业 时间:2024/08/17 18:36:05
1992+1998+2000+1998+2001+2005+1999+1998
![1992+1998+2000+1998+2001+2005+1999+1998](/uploads/image/z/16784597-29-7.jpg?t=1992%2B1998%2B2000%2B1998%2B2001%2B2005%2B1999%2B1998)
=1992+1998*3+2000+2005+(2001+1999)
=1992+1998*3+4005+4000
=(1992+8)+(1998+2)*3+8005-(8+2*3)
=2000+6000+8005-14
=16005-14
=15991
或者
=(1992+8)-8+(1998+2)-2+2000+(1998+2)-2+(2001-1)+1+(2005-5)+5+(1999+1)-1+(1998+2)-2
=2000+2000+2000+2000+2000+2000+2000+2000-8-2--2+1+5-1-2
=16000-9
=15991
这题很简单,说白了就是都配成整数2000,最后该加的加,该减的减
再问: 1992+1988+2000+1998+2001+2005+1999+1998
=1992+1998*3+4005+4000
=(1992+8)+(1998+2)*3+8005-(8+2*3)
=2000+6000+8005-14
=16005-14
=15991
或者
=(1992+8)-8+(1998+2)-2+2000+(1998+2)-2+(2001-1)+1+(2005-5)+5+(1999+1)-1+(1998+2)-2
=2000+2000+2000+2000+2000+2000+2000+2000-8-2--2+1+5-1-2
=16000-9
=15991
这题很简单,说白了就是都配成整数2000,最后该加的加,该减的减
再问: 1992+1988+2000+1998+2001+2005+1999+1998
1998/1998*1999 +1998/1999*2000 +1998/2000*2001 +1998/2001*20
1998/1998*1999+1998/1999*2000+1998/2000*2001+.+1998/2049*205
2005*1997+2004*1998+2003*1999+2002*2000+2001*2001
1997/1998+1999/2000+2001/2002+2003/2004+2005/2006
1998/(1998+1998/1999)+1/2000=?
1991+1992+1993+1994+1995+1996+1997+1998+1999+2000+2001+2001
1998*1999/1998+1999*2000/1998+…+2049*2050/1998
1999×1999-1998×2000
2001-2000-1999+1998+1997-1996+1995-1994-1993+1992+1991-1990+
1991+1992+1993+1994+1995+1996+1997+1998+1999+2000+2001+2002=
2003+1991-1992+1993-1994+1995-1996+1997-1998+1999-2000+2001-
用简便方法计算(1999^2-2005)(1999^2+3995)*2000/1996*1998*2001*2002