一年级数学一年级数学（下册下册）两位数两位数减减一位数（一位数（借借位）位） 21-5= 34-7= 67-8= 88-9= 52-3= 41-5= 24-7= 57-9= 26-8= 25-7= 71-4= 74-7= 47-8= 36-8= 42-3= 31-9= 54-6= 44-7= 33-5= 74-8= 61-4= 94-7= 87-8= 26-7= 22-3= 35-7= 81-7= 51-3= 31-7= 77-8= 24-8= 56-7= 27-8= 33-8= 23-5= 37-9= 44-8= 55-8= 81-6= 42-7= 73-7= 52-8= 66-8= 76-9= 43-9= 55-7= 92-8= 96-8= 37-8= 62-8=
