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,整十数加一位数和相应的减法,说说数的组成：,_ 个十，_个一， 合起来是_。,5,2,25,_ 个十，_个一， 合起来是_。,3,6,63,20,+,5,=,25,加法,5,+,20,=,25,302,想一想：,230,322,想一想：,302,230,40,+,2,=,42,加数,加数,和,30,4,34,4,30,34,42,-,2,=,40,被减数,减数,差,45,5,40,45,40,5,50,7,57,57,7,50,7,50,57,57,50,7,20,8,28,28,8,20,8,20,28,28,20,8,填一填,填一填,20,4,24,24,4,20,4,20,24,24,20,4,同学们，下课了，再见！,
