题目内容
合理灵活地进行计算.
|
|
| [1-(
|
|
(1)
×8÷
,
=
÷
,
=2.5;
(2)
×99+
,
=
×(99+1),
=
×100,
=16;
(3)
÷
÷
,
=
÷
,
=
;
(4)[1-(
+
)]÷
,
=[1-
]÷
,
=
÷
,
=
;
(5)
×
×
,
=
×
,
=
.
| 1 |
| 5 |
| 16 |
| 25 |
=
| 8 |
| 5 |
| 16 |
| 25 |
=2.5;
(2)
| 4 |
| 25 |
| 4 |
| 25 |
=
| 4 |
| 25 |
=
| 4 |
| 25 |
=16;
(3)
| 7 |
| 10 |
| 6 |
| 5 |
| 21 |
| 32 |
=
| 7 |
| 12 |
| 21 |
| 32 |
=
| 8 |
| 9 |
(4)[1-(
| 3 |
| 10 |
| 3 |
| 5 |
| 4 |
| 5 |
=[1-
| 9 |
| 10 |
| 4 |
| 5 |
=
| 1 |
| 10 |
| 4 |
| 5 |
=
| 1 |
| 8 |
(5)
| 3 |
| 4 |
| 1 |
| 9 |
| 3 |
| 2 |
=
| 1 |
| 12 |
| 3 |
| 2 |
=
| 1 |
| 8 |
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