计算下面各题,如何简便就如何算.15×38÷9420×(25 16-
试题谜底:(1)15×38÷94
=458÷94
=212;
(2)20×(25 16-415)
=20×(1730-415)
=20×310
=6;
(3)35×713 35×613
=35×(713 613)
=35×1
=35;
(4)10-(43 13×2)
=10-(43 23)
=10-2
=8.
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试题谜底:(1)15×38÷94
=458÷94
=212;
(2)20×(25 16-415)
=20×(1730-415)
=20×310
=6;
(3)35×713 35×613
=35×(713 613)
=35×1
=35;
(4)10-(43 13×2)
=10-(43 23)
=10-2
=8.