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苏教版一年级下册数学课件1.20以内的退位减法
苏教版一年级数学下册教学课件 卖桃啦, 卖桃啦! 我要买9个 桃子. 还剩多少个? 15- 9 = 6 15- 9 = 6 13- 9 = 4 17- 9 = 8 12- 9 = 3 拿走9个,还剩多少个? 16- 9 = 7 11- 9 2= 14- 9 5= 18- 9 9= 12- 9 3= 11 - 9 = 14 - 9 = 18 - 9 = 2 5 9 11-9= 小猴摘桃 18-9= 13-9= 17-9= 16-9= 2 9 4 8 7 11-9= 12-9= 13-9= 14-9= 15-9= 16-9= 17-9= 18-9= 19-9= 2 3 4 5 6 7 8 9 10 11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9 19 - 9 = 10 仔细观察 你发现了 什么? 11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9 19 - 9 = 10 11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9 19 - 9 = 10查看更多