| 计算下面各题(能简算的要简算). 807×99+807 | [1-(
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| 20.11×83+1.7×201.1 |
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=807×(99+1),
=807×100,
=80700;
(2)[1-(
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(3)20.11×83+1.7×201.1,
=20.11×83+17×20.11,
=20.11×(83+17),
=20.11×100,
=2011;
(4)
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