问题 解答题
认真观察例题,找出规律,试着解答后面的题.
例:
1665+16651665+166516651665
1998+19981998+199819981998

=
1665×(1+10001+100010001)
1998×(1+10001+100010001)

=
1665
1998
=
5×333
9×222

=
5
6

该你出招了:
1999+19991999+199919991999
1997+19971997+19971997997
-
2
1997
=
答案

1999+19991999+199919991999
1997+19971997+19971997997
-
2
1997

=

1999×(1+10001+100010001)
1997×(1+10001+100010001)
-
2
1997

=

1999
1997
-
2
1997

=1.

单项选择题 1.0
单项选择题