题目内容
| 计算下面各题(能简算的要简算). 807×99+807 |
[1-(
| ||||||||
| 20.11×83+1.7×201.1 |
|
(1)807×99+807,
=807×(99+1),
=807×100,
=80700;
(2)[1-(
-
)]×
,
=[1-
]×
,
=
×
,
=
;
(3)20.11×83+1.7×201.1,
=20.11×83+17×20.11,
=20.11×(83+17),
=20.11×100,
=2011;
(4)
×
+
÷
.
=
×(
+
),
=
×1,
=
.
=807×(99+1),
=807×100,
=80700;
(2)[1-(
| 1 |
| 2 |
| 1 |
| 4 |
| 2 |
| 5 |
=[1-
| 1 |
| 4 |
| 2 |
| 5 |
=
| 3 |
| 4 |
| 2 |
| 5 |
=
| 3 |
| 10 |
(3)20.11×83+1.7×201.1,
=20.11×83+17×20.11,
=20.11×(83+17),
=20.11×100,
=2011;
(4)
| 6 |
| 5 |
| 3 |
| 8 |
| 5 |
| 8 |
| 5 |
| 6 |
=
| 6 |
| 5 |
| 3 |
| 8 |
| 5 |
| 8 |
=
| 6 |
| 5 |
=
| 6 |
| 5 |
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