一年级下册两位数减一位数、整十数减一位数退位减法 42-8= 21-5= 27-8= 82-6= 92-8= 80-3= 35-8= 62-4= 32-7= 20-5= 20-9= 63-4= 61-3= 84-5= 40-4= 62-4= 86-8= 80-3= 93-8= 90-3= 96-8= 42-8= 33-9= 21-2= 10-8= 52-3= 10-8= 50-2= 16-8= 51-7= 65-6= 70-3= 13-9= 52-3= 96-7= 62-6= 73-6= 45-6= 11-3= 81-7= 25-8= 35-8= 13-8= 12-5= 51-2= 50-7= 75-8= 70-5= 51-3= 70-7= 96-7= 31-8= 97-9= 87-8= 97-9= 70-9= 54-7= 81-9= 45-9= 43-4= 52-6= 52-8= 91-8= 84-8= 14-6= 53-9= 91-2= 46-7= 55-9= 61-6= 10-3= 44-7= 20-3= 50-6= 32-8= 23-5= 80-7= 70-9= 91-8= 50-7= 50-5= 32-7= 20-3= 83-9= 31-3= 82-8= 41-5= 10-7= 60-7= 14-5= 11-5= 42-7= 28-9= 93-8= 42-6= 22-4= 50-2= 41-3= 21-9= 84-8= 11-9= 93-6= 80-3= 33-6= 83-5= 41-7= 25-7= 54-9= 30-9= 74-8= 53-5= 51-3= 21-6= 74-8= 81-7= 52-4= 86-8= 52-9= 11-2= 14-6= 73-5= 65-9= 85-8= 15-9= 70-9= 82-5= 20-1= 22-6= 72-7= 65-6= 42-7= 35-7= 93-4= 13-7= 21-4= 35-7= 20-8= 40-7= 16-8= 42-5= 97-9= 36-7= 27-9= 81-9= 21-2= 82-9= 57-9= 82-5= 41-9= 42-8= 80-3= 80-1= 70-9= 15-6= 77-8= 62-5= 62-4= 70-7= 88-9= 41-8= 40-3= 13-9= 36-9= 85-9= 14-9= 85-7= 63-6= 16-7= 22-9= 95-7= 65-6= 41-6= 15-9= 40-8= 66-8= 44-7= 72-9= 91-9= 52-5= 70-3= 80-6= 72-9= 26-9= 13-8= 40-9= 24-5= 51-2= 81-5= 73-5= 72-4= 53-9= 73-9= 41-2= 96-8= 22-4= 63-5= 67-8= 90-9= 37-9= 13-5= 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= 1...
