文档介绍：40-3= 77-9= 44-9= 52-5= 71-2= 61-8= 25-6= 30-5= 50-5= 93-6= 53-6= 20-5= 73-9= 91-5= 34-5= 74-5= 71-9= 53-8= 22-9= 54-5= 91-6= 11-6= 92-6= 60-1= 32-7= 71-7= 90-4= 91-5= 10-2= 53-5= 42-7= 84-6= 31-2= 51-2= 41-4= 37-9= 30-5= 41-3= 71-4= 66-9= 98-9= 52-6= 63-7= 73-7= 37-8= 71-4= 87-8= 70-9= 90-8= 44-8= 82-3= 92-9= 54-9= 62-5= 13-4= 56-8= 20-2= 61-8= 78-9= 78-9= 83-5= 53-7= 70-9= 30-7= 12-7= 50-2= 32-7= 66-7= 54-7= 94-8= 33-6= 98-9= 22-9= 10-4= 70-2= 23-7= 57-8= 53-8= 13-5= 84-8= 44-5= 97-8= 76-7= 15-8= 74-8= 41-7= 73-4= 87-8= 11-9= 10-5= 61-4= 13-7= 25-9= 13-5= 76-8= 12-8= 56-7= 60-5= 46-7= 50-9= 31-2= 11-5= 80-3= 48-9= 65-9= 70-4= 50-4= 60-8= 73-8= 84-5= 57-9= 90-6= 70-1= 34-8= 22-9= 83-8= 52-5= 63-5= 52-5= 66-9= 71-9= 40-9= 63-4= 54-7= 94-5= 43-6= 12-6= 30-6= 90-1= 20-2= 11-2= 41-4= 35-9=
46-9= 52-9= 52-6= 45-9= 71-5= 13-4= 35-7= 63-6= 90-2= 80-8= 61-6= 91-2= 17-8= 85-7= 12-9= 80-4= 82-7= 66-9= 23-5= 44-7= 13-6= 75-9= 13-5= 40-8= 55-7= 83-7= 61-2= 20-7= 63-6= 41-3= 24-5= 86-9= 57-9= 42-5= 60-2= 74-6= 71-5= 20-8= 81-7= 12-4= 81-9= 93-6= 66-7= 85-7= 17-9= 84-6= 82-5= 15-6= 81-5= 20-8= 30-3= 52-