文档介绍：20以内退位减法口算题
14-7=
12-6=
11-6=
6+7=
17-9=
7+8=
16-9=
15-8=
17-8=
6+9=
14-9=
13-7=
11-9=
14-6=
15-6=
17-8=
11-7=
11+2=
8+6=
13-6=
15-4=
15-8=
13-9=
12-6=
16-7=
11-9=
14-3=
14-7=
16-8=
11-3=
18-7=
12-8=
13-6=
18-9=
8+6=
17-8=
13-2=
11-5=
16-7=
5+6=
12-6=
11-6=
14-6=
1512-5=
14-8=
12-8=
13-7=
16-7=
15-6=
12-5=
11-9=
17-8=
16-8=
14-7=
12-4=
13-5=
11-8=
14-8=
13-9=
15-6=
15-9=
16-8=
16-7=
15-9=
12-7=
12-6=
12-( )=9
11-8=
15-( )=7
12-( )=3
17-( )=9
13-5=
( )-6=7
12-( )=5
13-( )=8
( )-7=7
14-( )=6
15-( )=9
11-( )=7
17-( )=8
( )-5=7
13-( )=7
13-( )=5
15-( )=8
12-( )=9
17-( )=7
12-( )=6
16-( )=9
( )-4=7
18-7=
( )-6=5
14-( )=6
15－9=
12－6=
17－9=
18－9=
11－2=
16－9=
16－8=
12－3=
15－6=
14－6=
13－6=
13－4=
15－9=
13－8=
15－8=
15－7=
13－7=
12－8=
14－9=
17－8=
12－6=
12－7=
12－4=
14－8=
13－9=
11－8=
12－9=
11－4=
11－6=
14－7=
11－7=
11－3=
14－9=
12－6=
12－7=
17－8=
12－4=
16－7=
11－8=
14－8=
12－9=
16－7=
14－7=
12－8=
12－8=
15－9=
14－7=
11－3=
14－6=
12－4=
14－6=
17－8=
13－8=
20－4=
13－8=
15－6=
15－7=
15－6=
15－9=
15－9=
17－8=
15－9=
14－7=
13－8=
14－8=
11－2=
15－9=
12－4=
11－4=
15－