二年级上册数学错中求解——小马虎解题
练习一错中求解姓名1、小马虎在做一道减法题的时候,把减数72错写成27,这时得到的差是309,正确的差是多少?2、小马虎在做一道减法题时,把被减数十位上的6看成成了9,把被减数百位上的3看成8,结果是936。正确的结果是多少?3、小马虎做一道加法题时,把一个加数个位上的6看成9,十位上的8看成3,结果算出的和是123,正确的和是多少?4、小马虎在做一道加法题时,把一个加数十位上的7写成了2,个位上的8写成了3,结果是790.正确的和是多少?5、小马虎做一道乘法题,他把其中一个乘数28写成了23,结果得到的积是115,那么正确的积是多少?6、小马虎做一道乘法题,他把其中一个乘数37写成了31,结...
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