20以内退位减法口算题.doc

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=
15-8=
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
4+7=
( )-6=5
14-( )=6
18-( )=9
20-5
15-9
4-3
8-8
15-6
18-9
17-6