① ② ③ ④
池塘里一共有有只小鸭,游走了只,还剩只.
13-3= | 13-4= | 13-5= |
13-6= | 13-= | -= |
=
=
填一填
12-5=
14-57
3+711
12-75
11-2= 13-4= 16-8= 13-6=
17-9= 12-9= 11-5= 15-9=
15-8= 17-8= 13-8= 14-6=
14-9= 11-7= 16-9= 13-9=
12-6= 12-4= 12-7= 14-7=
9+=16 +2=14 4+=12
20-=10 9+1=+=+
12-4= 11-8= 14-5= 15-8=
13-6= 8+4= 8+7= 11-9=
9+9= 18-7= 11+4= 17-9=
15-5= 8-5= 6+9= 2+10=
16-7= 7+6=
□○□=□(个)
□○□=□(个)