文档介绍：20以内进退位加减法
20以内退位减法（1）
11-7= 13-5= 14-9= 12-8=
11-9= 12-9= 12-7= 11-3=
12-3= 16-7= 15-6= 13-9=
17-9= 14-8= 15-9= 17-8=
13-8= 12-6= 14-7= 11-6=
14-6= 11-4= 11-2= 13-4=
13-6= 12-4= 11-8= 12-5=
13-7= 14-5= 15-7= 18-9=
11-5= 15-8= 16-9= 16-8=
13-8= 12-6= 14-7= 11-6=
13-7= 14-5= 15-7= 18-9=
12-3= 16-7= 15-6= 13-9=
20以内退位减法（2）
12-3= 16-7= 15-6= 13-9=
14-6= 11-4= 11-2= 13-4=
13-8= 12-6= 14-7= 11-6=
11-7= 13-5= 14-9= 12-8=
13-7= 14-5= 15-7= 18-9=
11-9= 12-9= 12-7= 11-3=
13-6= 12-4= 11-8= 12-5=
17-9= 14-8= 15-9= 17-8=
11-5= 15-8= 16-9= 16-8=
13-7= 14-5= 15-7= 18-9=
11-5= 17-9= 15-9= 11-3=
14-9= 12-9= 12-7= 14-7=
20以内退位减法（3）
14-6= 11-4= 11-2= 13-4=
12-3= 16-7= 15-6= 13-9=
13-8= 12-6= 14-7= 11-6=
17-9= 14-8= 15-9= 17-8=
11-5= 15-8= 16-9= 16-8=
11-9= 12-9= 12-7= 11-3=
13-7= 14-5= 15-7= 18-9=
11-7= 13-5= 14-9= 12-8=
13-6= 12-4= 11-8= 12-5=
13-8= 12-6= 14-7= 11-6=
12-3= 16-7= 15-6= 13-9=
11-5= 15-8= 16-9= 16-8=
20以内退位减法（4）
11-9= 12-9= 12-7= 11-3=
14-6= 11-4= 11-2= 13-4=
11-5= 15-8= 16-9= 16-8=
13-6= 12-4= 11-8= 12-5=
17-9= 14-8= 15-9=