题目内容

计算下列各题,能简算的要简算
(1)37.68-5.72-78.63-4.28
(2)112×(24-4
4
5
)÷24
(3)1993÷1993
1993
1995

(4)1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(1999÷2000)
(1)37.68-5.72-78.63-4.28,
=(37.68-78.63)-(5.72+4.28),
=-40.95-10,
=-50.95;

(2)112×(24-4
4
5
)÷24,
=112×19.2÷24,
=2150.4÷24,
=89.6;

(3)1993÷1993
1993
1995

=1993÷(1993+
1993
1995
),
=1993÷[1993×(1+
1
1995
)],
=1993÷[1993×
1996
1995
],
=1993÷1993÷
1996
1995

=1÷
1996
1995

=
1995
1996


(4)1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(1999÷2000),
=1÷
2
3
÷
3
4
÷
4
5
÷…÷
1998
1999
÷
1999
2000

=1÷(
2
3
×
3
4
×
4
5
×…×
1998
1999
×
1999
2000
),
=1÷
2
2000

=1000.
练习册系列答案
相关题目

违法和不良信息举报电话:027-86699610 举报邮箱:58377363@163.com

精英家教网