问题
解答题
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
(3)1993÷1993
(4)1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(1999÷2000) |
答案
(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
)÷24,4 5
=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.