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
)÷24
(3)1993÷1993
(4)1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(1999÷2000)
(1)37.68-5.72-78.63-4.28
(2)112×(24-4
| 4 |
| 5 |
(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
)÷24,
=112×19.2÷24,
=2150.4÷24,
=89.6;
(3)1993÷1993
.
=1993÷(1993+
),
=1993÷[1993×(1+
)],
=1993÷[1993×
],
=1993÷1993÷
,
=1÷
,
=
;
(4)1÷(2÷3)÷(3÷4)÷(4÷5)÷…÷(1999÷2000),
=1÷
÷
÷
÷…÷
÷
,
=1÷(
×
×
×…×
×
),
=1÷
,
=1000.
=(37.68-78.63)-(5.72+4.28),
=-40.95-10,
=-50.95;
(2)112×(24-4
| 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.
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