两位数减一位数退位减法练习课课件.ppt

单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,两位数减一位数（退位、不退位）练习课,复习旧知,36,8,26,10,2,28,36,8,20,16,8,28,6,减,8,不够减,怎么办？,我是这样想的。先,打开一捆小棒，,10,减,8,等于,2,，,26,加,2,等于,28,。,还可以这样想。打开,一捆小棒和,6,根合起来,是,16,16,减,8,等于,8,，,20,加,8,等于,28,。,6,4-60,=,7,3-8,=,5,0-,3,=,1,6-7,=,9,8-7,=,8,1-3,=,60,65,47,9,91,78,看谁最聪明？,54,-,=,4,6,8,7,7,8,6,9,5,5,9,用六边形外面的数作为被减数，分别减去,6,和,8,。说出得数，,73,3,2,5,4,8,9,1,6,0,1,2,3,6,我们一起帮小鸟找家吧！,46,8,34,5,54,8,54,3,7,4,5,6,7,8,9,3,2,1,0,9,8,7,6,5,4,开火车。,86,-7,-4,-8,23,+20,-7,-,10,71,-5,-30,-7,79,29,36,66,43,36,26,75,67,我们来给小树苗治病,看看谁的医术最高明,43-7=50,36-9=45,25-6=29,58-7=41,27,36,19,51,90,连续减,9,，写出每次减得的差。,90,81,、,、,、,、,、,、,。,72,63,45,54,36,27,18,26+8,45-8,54-6,9+36,73-40,48,45,33,34,37,配对连线,98-9=,27-8,建房子,19,89,80-7=,73,35-7=,28,33-7=,26,30-5=,25,42-3=,39,61-4=,57,52-6=,46,72-7=,65,98-60=,38,61-3=,58,47-20=,27,82-8=,74,50-6=,44,78-5=,73,42-7=,35,37-9=,28,65-4=,61,胜利！,星星蹦蹦跳,51-7=24-5=,32-6=33-4=,45+8=87-6=,76-9=96-60=,29,67,26,81,19,53,36,44,28,4,40,8,35-8,34-8,63,6,45,8,66,8,84,9,跷跷板,王宁再攒多少张邮票就和李敏同样多了？,31,-,8,23,我拔了,36,个萝卜。,已经运走了,20,个，还剩（）个。,大家吃了,9,个，还剩（）个。,36,20,16,（个）,36,9,27,（个）,拔萝卜,16,27,一个书包比一支钢笔贵多少钱？,34,-,8,26,20,-,8,12,一支钢笔比一个铅笔盒便宜多少钱？,阅读小组有女同学27名。,男同学,有,8,名,。,（1）女同学比男同学多多少名？,（2）阅读小组一共有多少名同学？,27,8,19,27,8,35,（名）,（名）,3,、,根据下图，你能提出哪些不同的数学问题？并算一算。,36,箱,9,箱,24,箱,