二年级数学(上册)人教版数学第二单元检测卷.1
第二单元过关检测卷一、填一填。(每空1分,共28分)1.笔算两位数加、减两位数时,应注意( )对齐,从( )位算起。2.在做加法时,个位满( ),向前一位进1。在做减法时,个位不够减时,要从( )位退1当( )来减。3.40比57少( );比37多23的数是( );35比9多( )比68少20的数是( )。4.减数是13,差是25,被减数是( )。5.按规律填数。(1)16 22 28 () () 46 ()(2)71 64 57 () 43 () ()(3)35 36 38 41 () () 56 ()6.在里填上合适的数。25+=45 27+=40 38+>>3/9...
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