十几减5432及练习四.ppt

20以内的退位减法 十几减5、4、3、2 练习课从 绿色圃中小学教育网 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 用儿歌来算：十几减9，是几加1。十几减8，是几加2。十几减7，是几加3。十几减6，是几加4。十几减5，是几加 。十几减4，是几加 。十几减3，是几加 。十几减2，是几加 。  5 6 7 8 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 11-5=1+5=6 17-5=7+5=12 12-5=2+5=7 13-5=3+5=8 14-5=4+5=9 15-5=5+5=10 16-5=6+5=11 18-5=8+5=13 19-5=9+5=14 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 11-4=1+6=7 17-4=7+6=13 12-4=2+6=8 13-4=3+6=9 14-4=4+6=10 15-4=5+6=11 16-4=6+6=12 18-4=8+6=14 19-4=9+6=15 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 11-3=1+7=8 17-3=7+7=14 12-3=2+7=9 13-3=3+7=10 14-3=4+7=11 15-3=5+7=12 16-3=6+7=13 18-3=8+7=15 19-3=9+7=16 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 11-2=1+8=9 17-2=7+8=15 12-2=2+8=10 13-2=3+8=11 14-2=4+8=12 15-2=5+8=13 16-2=6+8=14 18-2=8+8=16 19-2=9+9=17 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2. 列算式，并计算。 绿色圃中小学教育网 11 - 5 6 13 - 4 9 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 2、先说得数，在写算式。 3、 8 7 6 7 6 5 8 7 6 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. 12 - 5 7 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. （1）一共摘了13个桃子。吃了9个，还剩几个？ （2）一共有13只猴子。树上有 只，树下有几只？ 13 - 9 4 13 - 4 9 4 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile . Copyright 2004-2011 Aspose Pty Ltd. ＝13 ＝13 ＝13 4 7 ＝9 ＝9 ＝9 2 14 ＝8 ＝8 ＝8 4 4