100以内两位数不退位减法（2023-07-19）

100以内两位数不退位减法（2023-07-19）：68-14= 87-71= 95-23= 84-33= 75-62= 97-43= 92-10= 88-21= 89-66= 59-18= 76-16= 74-22= 64-51= 75-11= 48-27= 27-24= 85-72= 44-13= 98-32= 69-28= 29-18= 67-34= 39-30= 37-11= 64-20= 73-42= 37-36= 98-57= 58-38= 33-23= 89-60= 69-30= 57-23= 28-20= 53-10= 74-12= 99-52= 38-31= 26-25= 93-70= 87-22= 80-20= 47-27= 22-12= 78-26= 97-33= 89-16= 49-46= 87-20= 23-10= 72-41= 37-14= 97-56= 57-46= 78...