文档介绍:81-7= 36-7= 31-7= 10-3= 34-5=
55-8= 15-9= 12-4= 55-9= 25-6=
20-6= 62-9= 92-7= 74-9= 23-6=
10-5= 92-5= 10-8= 31-5= 12-4=
92-5= 65-8= 50-4= 16-8= 12-6=
75-7= 15-6= 82-5= 93-9= 45-7=
85-9= 92-8= 31-6= 62-5= 45-9=
10-6= 82-5= 95-8= 23-4= 50-3=
43-4= 70-5= 31-7= 51-2= 82-3=
92-5= 25-9= 44-6= 73-8= 90-6=
76-7= 32-9= 10-7= 33-5= 70-2=
12-7= 46-8= 45-6= 41-7= 23-9=
90-7= 10-4= 72-6= 21-5= 23-5=
81-2= 52-4= 73-6= 81-5= 16-8=
70-4= 80-8= 44-6= 60-5= 51-5=
80-9= 72-4= 94-5= 13-8= 64-8=
31-5= 20-2= 13-7= 32-4= 71-6=
53-7= 51-3= 50-5= 72-3= 67-8=
74-9= 50-2= 61-5= 27-9= 32-3=
72-7= 70-5= 32-6= 73-7= 60-3=
61-7= 50-1= 45-6= 63-6= 40-8=
47-8= 27-8= 63-4= 82-3= 44-8=
43-5= 96-9= 71-3= 52-4= 72-9=
51-3= 80-5= 50-2= 93-4= 30-9=
31-4= 85-6= 41-7= 32-3= 30-2=
35-8= 81-4= 60-8= 92-3= 31-4=
22-3= 35-7= 10-1= 83-8= 66-7=
56-7= 73-9= 90-8= 60-4= 44-7=
71-7= 65-9= 96-9= 15-9= 82-9=
42-5= 13-6= 20-5= 13-5= 63-4=
80-8= 18-9= 10-1= 82-9= 22-5=
32-3= 22-5= 98-9= 91-2= 62-7=
41-4= 65-7= 64-6= 12-4= 60-2=
55-8= 30-8= 62-9= 91-6= 44-6=
21-4= 54-6= 62-3= 77-9= 30-7=
20-2= 30-3= 70-6= 50-3= 25-9=
12-3= 92-8= 65-8= 10-7= 11-5=
81-8= 25-6= 63-6= 16-9= 42-4=
51-6= 41-5= 81-5= 13-6= 11-2=
54-6= 62-3= 64-8= 24-7= 41-4=
75-7= 22-7= 71-9= 20-2= 12-8=
21-2= 91-4= 53-8= 61-8= 56-7=
15-6= 26-9= 22-9= 78-9= 60-5=
94-7= 61-9= 54-5= 78-9= 46-7=
71-2= 80-4= 91-6= 83-5= 50-9=
90-3= 75-9= 11-6= 53-7= 31-2=
85-9= 95-8= 92-6= 70-9= 11-5=
12-3= 14-7= 60-1= 30-7= 80-3=
52-6= 31-5= 32-7= 12-7= 48-9=
76-8= 64-6= 71-7= 50-2= 65-9=
62-3= 97-9= 90-4= 32-7= 70-4=
40-5= 94-9= 91-5= 66-7= 50-4=
40-1= 72-9= 10-2= 54-7= 60-8=
11-9= 30-8= 53-5= 94-8= 73-8=
21-4= 70-2= 42-7= 33-6= 84-5=
42-8= 33-7= 84-6= 98-9= 57-9=
63-7= 91-5= 31-2= 22-9= 90-6=
71-7= 20-6= 51-2= 10-4= 70-1=
50-6= 86-8= 41-4= 54-7= 34-8=
44-8= 76-8= 37-9= 70-2= 22-9=
12-9= 71-2= 30-5= 23-7= 83-8=
63-5= 72-4= 41-3= 57-8= 52-5=
67-8= 81-7= 71-4