苏教版一年级下册数学课件1.20以内的退位减法

苏教版一年级下册数学课件1.20以内的退位减法

20以内的退位减法复习 苏教版一年级数学下册教学课件 11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 11-5 11-4 11-3 11-2 13-6 14-6 15-6 12-5 13-5 14-5 12-4 13-4 12-3 20以内退位减法表 11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 11-5 11-4 11-3 11-2 13-6 14-6 15-6 12-5 13-5 14-5 12-4 13-4 12-3 2 3 4 5 6 7 8 9 11 11 11 11 11 11 11 11 13 13 13 13 1313 12 12 12 12 1212 12 14 14 14 1414 15 15 1515 16 1616 1717 11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 11-5 11-4 11-3 11-2 13-6 14-6 15-6 12-5 13-5 14-5 12-4 13-4 12-33 4 5 6 7 9 8 2 9 9 9 9 9 9 9 9 8 8 8 8 8 8 8 7 7 7 7 7 7 6 6 6 6 6 5 5 5 5 4 4 4 3 3 11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 11-5 11-4 11-3 11-2 13-6 14-6 15-6 12-5 13-5 14-5 12-4 13-4 12-3 9 9 9 9 9 9 9 9 863 4 5 72 11-9 12-9 13-9 14-9 15-9 16-9 17-9 18-9 11-8 12-8 13-8 14-8 15-8 16-8 17-8 11-7 12-7 13-7 14-7 15-7 16-7 11-6 12-6 11-5 11-4 11-3 11-2 13-6 14-6 15-6 12-5 13-5 14-5 12-4 13-4 12-3 猜 一 猜 17-9= 15-8= 13-5= 14－7= 11－8 = 16－9= 11－2= 13－5= 12－3= 绿色圃中小学教育网http://www.lspjy.com 7 8 8 3 7 7 8 9 9 开火车，算一算 18个 ？个 18－9 = 9（个） 12-4=8 12-8=4 写出两道减法算式 11-5 = - - - - 915 814 713 612 - - - - 715 614 513 412 = 16-8 想 一 想