一年级数学下册第2单元《20以内的退位减法》2.2《十几减8、7、6的提高练习》习题课件新人教版.ppt

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十几减8、7、6的提高练习,1.把生病的蘑菇找出来,并治好它。(对的画“”,错的画“”,并改正),题型 1,通过多种形式的练习提高计算能力,改正:_,1385,改正:_,1477,改正:_,2.小马拉车。,6,5,4,9,8,7,6,我发现:被减数不变,减数越大,差越( )。,小,3.将6、7、8、9填入 里,使等式成立。(每个数只用一次),题型 2,运用加减法之间的关系解决填数问题,6,9,7,8,(答案不唯一),4.,题型 3,运用减法解决问题,还要选多少个男生?, ( ),11,6,5,个,5.,要插多少面红旗?, ( ),7,1,6,面,

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