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Four short words sum up what has lifted most successful individuals above the crowd: a little bit more.-author-date一年级数学两位数减一位数退位减法练习题(分步计算)一年级数学姓名: 20 27 - 9 =( ) 43 - 6 =( )74 - 8 =( ) 62 - 4 =( ) 35 - 7 =( ) 55 - 6 =( )33 - 5 =( ) 56 - 7 =( )21 - 9 =( ) 71 - 8 =( )42 - 9 =( ) 82 - 8 =( )91 - 7 =( ) 73 - 8 =( )23 - 9 =( ) 42 - 7 =( )54 - 8 =( ) 74 - 9 =( )35 - 9 =( ) 63 - 7 =( )94 - 7 =( ) 24 - 8 =( )32 - 8 =( ) 35 - 6 =( )77 - 9 =( ) 67 - 8 =( )81 - 6 =( ) 74 - 6 =( )-