20以内退位减法口算练习题.doc

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11-4=
11-8=
14-8=
11-5=
11-8=
12-3=
15-9=
11-9=
13-6=
14-5=
12-9=
11-6=
11-5=
14-8=
13-8=
14-9=
12-8=
15-7=
14-8=
12-4=
11-5=
11-3=
13-7=
14-7=
16-9=
15-9=
15-7=
13-7=
14-6=
13-5=
17-9=
11-8=
15-7=
12-6=
12-4=
12-9=
17-9=
12-4=
14-7=
15-8=
13-5=
11-8=
14-9=
12-8=
14-8=
14-5=
18-9=
15-9=
11-6=
11-3=
11-2=
13-4=
12-9=
11-4=
13-9=
14-8=
11-8=
11-7=
16-8=
11-7=
12-4=
15-8=
12-8=
13-8=
16-8=
16-8=
12-8=
12-8=
13-7=
12-6=
13-6=
15-8=
12-7=
11-8=
14-5=
12-5=
12-8=
13-4=
13-6=
11-5=
14-7=
11-8=
11-4=
13-4=
15-8=
14-7=
12-9=
16-8=
14-5=
15-6=
11-5=
11-9=
12-9=
13-6=
14-9=
15-7=
12-4=
15-6=
12-4=
13-9=
14-8=
12-3=
11-8=
12-9=
15-7=
12-3=
15-9=
12-7=
16-9=
12-8=
17-9=
13-5=
13-6=
11-7=
16-7=
11-8=
12-6=
12-9=
15-8=
11-7=
12-5=
12-3=
12-3=
15-9=
16-8=
11-7=
15-6=
12-9=
14-9=
11-5=
13-5=
16-8=
13-7=
12-5=
11-8=
11-9=
13-6=
13-4=
12-8=
12-6=
12-9=
12-5=
13-5=
11-4=
12-9=
18-9=
16-9=
13-9=
16-8=
16-9=
16-9=
11-3=
14-9=
16-7=
16-7=
13-6=
13-6=
15-9=
15-9=
11-7=
12-3=
13-6=
12-8=
12-9=
11-7=
16-7=
16-9=
15-6=
12-4=
15-8=
12-7=
12-5=
16-8=
13-7=
11-9=
14-9=
13-8=
14-7=
13-9=
11-9=
11-8=
13-5=
14-9=
11-6=
13-5=
11-6=
14-9=
14-7=
12-9=
16-7=
12-8=
13-5=
11-7=
15-8=
11-8=
12-9=
17-8=
12-5=
13-9=
12-6=
16-8=
13-4=
17-8=
12-7=
11-7=
11-6=
15-6=
14-9=
11-4=
17-8=
14-6=
13-7=
12-3=
12-4=
16-9=
12-5=
13-5=
11-3=
14-7=
14-7=
11-7=
16-9=
12-3=
12-3=
14-8=
12-9=
11-5=
14-7=
13-6=
12-3=
13-5=
12-7=
13-6=
14-8=
14-7=
12-3=
16-9=
12-8=
16-9=
16-9=
12-4=
13-8=
13-5=
11-8=
12-4=
15-6=
11-9=
11-8=
14-8=
15-9=
单纯的课本内容，并不能满足学生的需要，通过补充，达到内容的完善
教育之通病是教用脑的人不用手，不教用手的人用脑，所以一无所能。教育革命的对策是手脑联盟，结果是手与脑的力量都可以大到不可思议。