20-8=
13-8=
20-12=
13-5=
12-8=
15-7=
11-2=
14-9=
14-9=
20-4=
20-1=
11-5=
10-9=
16-8=
20-18=
20-13=
20-11=
12-8=
20-4=
13-4=
11-5=
13-4=
11-2=
11-7=
20-9=
16-9=
20-12=
10-2=
17-9=
20-19=
17-8=
12-9=
10-1=
15-9=
14-6=
11-2=
20-4=
16-7=
12-7=
11-8=
20-1=
15-8=
10-4=
15-9=
15-6=
10-2=
16-7=
10-7=
20-2=
14-7=
11-9=
14-5=
13-9=
12-4=
14-8=
14-7=
11-6=
11-6=
13-4=
13-7=
10-3=
12-7=
12-7=
11-7=
11-2=
10-9=
12-6=
17-9=
17-9=
13-4=
12-8=
20-2=
15-9=
11-2=
14-5=
12-3=
20-3=
11-8=
18-9=
12-3=
11-5=
14-7=
20-19=
11-2=
14-7=
13-7=
12-3=
20-19=
20-1=
13-5=
20-17=
11-3=
13-8=
20-13=
11-7=
13-4=
15-6=
20-15=
16-7=
20-1=
20-15=
20-7=
11-9=
11-7=
20-11=
20-3=
14-9=
20-16=
11-5=
20-6=
20-4=
14-9=
12-5=
20-13=
14-5=
12-5=
20-14=
11-2=
10-5=
20-16=
17-8=
14-9=
14-6=
10-2=
14-5=
11-3=
18-9=
11-6=
15-8=
14-7=
10-5=
12-9=
14-7=
20-4=
10-3=
10-8=
10-6=
12-9=
15-8=
10-8=
12-6=
13-8=
20-1=
13-8=
20-12=
10-7=
11-5=
14-9=
10-8=
20-8=
13-6=
20-1=
12-5=
11-4=
12-8=
12-7=
17-8=
15-7=
20-9=
20-13=
20-16=
20-17=
14-6=
11-2=
20-2=
17-9=
13-7=
13-8=
15-6=
13-9=
10-7=
10-3=
20-12=
16-8=
16-8=
10-7=
20-14=
11-4=
20-13=
14-7=
20-7=
14-8=
20-4=
20-17=
10-7=
12-5=
15-8=
11-6=
18-9=
12-9=
10-3=
10-5=
18-9=
15-7=
13-5=
12-3=
20-3=
11-8=
17-9=
20-15=
20-17=
13-6=
20-11=
14-5=
20-7=
20-7=
14-9=
14-8=
16-9=
20-12=
20-8=
20-7=
17-9=
14-5=
16-7=
11-2=
10-6=
20-14=
11-4=
10-7=
10-6=
20-5=
20-14=
14-6=
14-8=
15-9=
13-6=
12-4=
13-8=
10-8=
20-5=
20-3=
20-4=
13-7=
20-3=
11-4=
20-5=
11-9=
18-9=
14-5=
12-6=
20-6=
13-9=
13-5=
13-8=
12-3=
12-9=
10-3=
11-7=
20-14=
14-5=
20-17=
11-7=
20-15=
13-6=
12-4=
13-6=
17-8=
10-9=
11-2=
14-8=
10-7=
20-7=
12-8=
14-6=
20-5=
14-9=
11-4=
13-6=
13-5=
10-8=
10-9=
11-8=
17-9=
12-3=
20-3=
18-9=
20-2=
13-9=
10-3=
20-1=
20以内退位减法100题-30套 来自淘豆网m.daumloan.com转载请标明出处.