题目内容
观察下列各式的计算结果
1-
=1-
=
=
×
1-
=1-
=
=
×
1-
=1-
=
=
×
1-
=1-
=
=
×
…
(1)用你发现的规律填写下列式子的结果:
1-
=______×______
1-
=______×______
(2)用你发现的规律计算:
(1-
)×(1-
)×(1-
)×…×(1-
)×(1-
).
1-
1 |
22 |
1 |
4 |
3 |
4 |
1 |
2 |
3 |
2 |
1-
1 |
32 |
1 |
9 |
8 |
9 |
2 |
3 |
4 |
3 |
1-
1 |
42 |
1 |
16 |
15 |
16 |
3 |
4 |
5 |
4 |
1-
1 |
52 |
1 |
25 |
24 |
25 |
4 |
5 |
6 |
5 |
…
(1)用你发现的规律填写下列式子的结果:
1-
1 |
62 |
1-
1 |
1002 |
(2)用你发现的规律计算:
(1-
1 |
22 |
1 |
32 |
1 |
42 |
1 |
20122 |
1 |
20132 |
(1)1-
=1-
=
=
×
,
1-
=1-
=
=
×
;
(2)根据题意得:原式=
×
×
×
×
×
×
×
×…×
×
=
.
故答案为:
;
;
.
1 |
62 |
1 |
36 |
35 |
36 |
5 |
6 |
7 |
6 |
1-
1 |
1002 |
1 |
10000 |
9999 |
10000 |
99 |
100 |
101 |
100 |
(2)根据题意得:原式=
1 |
2 |
3 |
2 |
2 |
3 |
4 |
3 |
3 |
4 |
5 |
4 |
4 |
5 |
6 |
5 |
2012 |
2013 |
2014 |
2013 |
=
1007 |
2013 |
故答案为:
5 |
6 |
7 |
6 |
99 |
100 |
101 |
100 |
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