Question

【题目】列式计算

57-35= 56-38= 85-51= 95-19=

45-11= 75-26= 48-36= 98-10=

31-25= 40-30= 53-17= 29-18=

76-59= 83-74= 55-41= 38-37=

80-75= 42-12= 97-62= 96-16=

82-58= 84-27= 79-43= 57-49=

79-58= 83-30= 91-32= 72-27=

Answer 1

【答案】略

【解析】两位数减两位数，相同数位对齐相减，个位不够减从十位退1 再减。