100以内两位数不退位减法（2023-07-24）

100以内两位数不退位减法（2023-07-24）：69-47= 66-34= 82-32= 77-24= 50-40= 73-61= 58-57= 96-81= 48-21= 86-20= 57-15= 53-51= 98-73= 81-10= 56-20= 92-91= 63-22= 48-18= 86-43= 84-24= 88-12= 57-40= 44-30= 73-33= 87-83= 52-32= 67-51= 77-47= 98-55= 96-35= 44-11= 96-60= 33-21= 56-42= 85-45= 98-71= 79-62= 58-36= 98-30= 54-22= 71-20= 66-13= 49-40=...