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,整十数加一位数及相应的减法,2020/7/4,1,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_。,3,6,63,2020/7/4,2,20,+,5,=,25,加法,5,+,20,=,25,2020/7/4,3,302,想一想：,230,2020/7/4,4,322,想一想：,302,230,2020/7/4,5,2020/7/4,6,2020/7/4,7,40,+,2,=,42,2020/7/4,8,30,4,34,4,30,34,2020/7/4,9,42,-,2,=,40,2020/7/4,10,45,5,40,45,40,5,2020/7/4,11,50,7,57,57,7,50,7,50,57,57,50,7,2020/7/4,12,
