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# 20以内的退位减法__整理与复习

20以内退位减法

11-9 12-9 13-9 14-9

11-8 12-7 13-8 14-8 14-7

11-6 12-5 13-6 14-5

11-4 12-3

11-2

13-4

15-9
16-9 17-9 18-9 16-8 17-8 16-7

15-6

11-9 12-9 13-9 14-9 15-9 16-9

11-8 12-8 13-8 14-8

11-7 12-7 13-7 14-7

11-6 12-6 13-6 14-6

11-5 12-5

11-4 12-4

11-3 11-2 12-3

13-5
14-5

13-4

15-8
16-8 17-8

15-7
16-7

15-6

17-9
18-9

11- 9 12- 9 13- 9

11- 8 12- 8 13- 8 14- 8

11- 7

11- 6 12- 6 13- 6 14- 6

11- 5 12- 5 13- 5 14- 5

11- 4 12- 4 13- 4

11- 3 12- 3

11- 2

12- 7
13- 7 14- 7

14- 9 15- 9
16- 9 17- 9 18- 9

15- 8
16- 8

15- 7
16- 7

15- 6

17- 8

11- 9

11- 8

11- 7

11- 6

11- 5

11- 4

11- 3

11- 2

12- 9 12- 8 13- 9 13- 8 14- 9 14- 8 15- 9 15- 8 16- 9 16- 8

12- 7 12- 6

12- 5
13- 5

12- 4 12- 3
13- 4

13- 7 13- 6
14- 7 14- 6 15- 7 15- 6 16- 7

14- 5

17- 9 17- 8
18- 9

11- 9

11- 8

11- 7

11- 6

11- 5

11- 4

11- 3 12- 3

11- 2

12- 9 12- 8 13- 9 13- 8 14- 9 14- 8 15- 9 15- 8 16- 9 16- 8 17- 9 17- 8 18- 9

12- 7 12- 6 13- 7 13- 6 14- 7 14- 6 15- 7 15- 6 16- 7

12- 5 12- 4 13- 5 13- 4 14- 5

②在计算中用到哪些方法？

20以内退位减法表 11-9 12-9 11-8 12-8 13-8 14-8 11-7 12-7 13-7 14-7 11-6 12-6 13-6 14-6 11-5 12-5 11-4 12-4 11-3 11-2 12-3

13-9
14-9 15-9 16-9 17-9 18-9

13-5
14-5

13-4

15-8
16-8 17-8

15-7
16-7

15-6

13-9
14-9 15-9 16-9 17-9 18-9

13-5
14-5

13-4

15-8
16-8 17-8

15-7
16-7

15-6

11-9 12-9

11-8 12-8 13-8 14-8

11-7 12-7 13-7 14-7

11-6 12-6 13-6 14-6

11-5 12-5

11-4 12-4

11-3 11-2 12-3

13-9
14-9 15-9 16-9 17-9 18-9

13-5
14-5

13-4

15-8
16-8 17-8

15-7
16-7

15-6

11-9 12-9

11-8 12-8 13-8 14-8

11-7 12-7 13-7 14-7

11-6 12-6 13-6 14-6

11-5 12-5

11-4 12-4

11-3 11-2 12-3

13-9
14-9 15-9 16-9 17-9 18-9

13-5
14-5

13-4

15-8
16-8 17-8

15-7
16-7

15-6

11-9

11-8 12-8

11-7

11-6
12-6 13-6 14-6 15-6

11-5 12-5 13-5

11-4

11-3 11-2
12-3

12-9
13-9 14-9 15-9 16-9

12-7
13-7 14-7 15-7 16-7

12-4
13-4

13-8
14-8 15-8 16-8 17-8

14-5

17-9
18-9

7 5 12 12 5 7

7 5 12 12 5 7 8 7 15 15 7 8 8 7 15 15 7 8

3+8= 11 11—8= 3 4+9=13 13―9= 4 5+7= 12
12—5= 7 11—3= 8 13—4= 9

12—7= 5

12-9= 13-8=

17-9= 15-8= 18-9= 17-8= 16-9=

12-9= 19-9=

14-3= 14-9=

×

12-5=7(串)

① ②