20以内退位减法口算题.doc
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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