1999+19991999+199919991999 2------------------------------------------ ---- -------------1997+19971997+199719971997 1997是分数简算题

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/05 23:19:57
1999+19991999+199919991999 2------------------------------------------ ---- -------------1997+19971997+199719971997 1997是分数简算题

1999+19991999+199919991999 2------------------------------------------ ---- -------------1997+19971997+199719971997 1997是分数简算题
1999+19991999+199919991999 2
------------------------------------------ ---- -------------
1997+19971997+199719971997 1997
是分数简算题

1999+19991999+199919991999 2------------------------------------------ ---- -------------1997+19971997+199719971997 1997是分数简算题
=1999×(1+10001+100010001)/[1997×(1+10001+100010001)]-2/1997
=1999/1997-2/1997
=1997/1997
=1