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

分类: 作业答案 • 2022-06-07 17:03:32

问题描述：

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

答

=1999×(1+10001+100010001)/[1997×(1+10001+100010001)]-2/1997
=1999/1997-2/1997
=1997/1997
=1