This unit is actually a turning point that determines whether a student will be 'good' or 'bad' at math. The topics covered in 2nd grade include '3-digit numbers,' '3-digit addition and subtraction,' ...
In lower grade math practice, time is needed to repeat the same content. On the other hand, for children who are not yet used to calculation, just not knowing 'how many questions to do' or 'what to do ...
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