观察下列各式,回答问题1-122=12×13,1-132=23×43,1-142=34×54….按上述规律填空:(1)1-11002=______×______,1-120052=______×___

题目简介

观察下列各式,回答问题1-122=12×13,1-132=23×43,1-142=34×54….按上述规律填空:(1)1-11002=______×______,1-120052=______×___

题目详情

观察下列各式,回答问题
1-
1
22
=
1
2
×
1
3
1-
1
32
=
2
3
×
4
3
1-
1
42
=
3
4
×
5
4
….
按上述规律填空:
(1)1-
1
1002
=______×______,1-
1
20052
=______×______.
(2)计算:(1-
1
22
)×(1-
1
32
)
…×(1-
1
20042
)×(1-
1
20052
)
题型:解答题难度:中档来源:不详

答案

(1)1-class="stub"1
1002
=class="stub"99
100
×class="stub"101
100
1-class="stub"1
20052
=class="stub"2004
2005
×class="stub"2006
2005


(2)(1-class="stub"1
22
)×(1-class="stub"1
32
)
…×(1-class="stub"1
20042
)×(1-class="stub"1
20052
)

=class="stub"1
2
×class="stub"3
2
×class="stub"2
3
×class="stub"4
3
×class="stub"2003
2004
×class="stub"2005
2004
×class="stub"2004
2005
×class="stub"2006
2005

=class="stub"1
2
×class="stub"2006
2005

=class="stub"1003
2005

故答案为:class="stub"99
100
class="stub"101
100
class="stub"2004
2005
class="stub"2006
2005

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