一年级数学下册【20以内退位进位加减法】口算题30套
20以内退位减法(1)
11-6= 13-7= 14-9= 12-8=
11-9= 12-9= 12-7= 11-3=
12-3= 16-7= 15-6= 13-9=
17-9= 14-8= 15-9= 17-8=
13-8= 12-6= 14-7= 11-6=
14-6= 11-4= 11-2= 13-4=
13-6= 12-4= 11-8= 12-5=
13-7= 14-6= 15-7= 18-9=
11-5= 15-8= 16-9= 16-8=
13-8= 12-6= 14-7= 11-6=
13-7= 14-5= 15-7= 18-9=
12-3= 16-7= 15-6= 13-9=
20以内退位减法(2)
12-3= 16-7= 15-6= 13-9=
14-6= 11-4= 11-2= 13-4=