20以内退位减法口算题
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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