100 以内两位数加减一位数（进位，退位）65-8= 8+39= 47+9= 33+7= 72-6= 32-6= 24-9= 66+4= 35-9= 55+7= 64-6= 27+4= 22+8= 72-9= 31-7= 16-8= 71-2= 97+3= 88-9= 54-7= 50-7= 6+54= 69+4= 42-7= 63-5= 24-5= 5+77= 8+82= 8+73= 74+6= 82-9= 56+7= 61-8= 43-9= 53-5= 7+46= 5+84= 79+5= 80-6= 46+7= 39+1=...

时间:2024-11-24 03:31栏目:行业资料