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练习四,两位数加一位数的进位加法,求比一个数多（少）几是多少,两位数加两位数的进位加法,12,30,50,62,32,62,50,7,57,10,47,57,10,70,80,40,40,80,9,52,=41,=41,=52,=52,=67,=67,=64,=64,=64,1718（个）,35,3540,答：能装得下。,40,6 7 + 1 5,1 6 + 2 9,5 5 - 5 0,5,2 3 + 1 7,0,1,4,1,1,2,8,5,4,5,82,45,35和7,13和29,15和27,18和24,45,46,47,48,49,50,51,52,53,54,55,30,31,32,33,34,35,36,37,38,39,40,49,50,51,52,53,54,55,56,57,58,59,20,21,22,23,24,25,26,27,28,29,30,32,33,34,35,36,37,38,39,40,41,42,26,27,28,29,30,31,32,33,34,35,36,86,11,97,+,70,28,+,98,83,15,+,=,98,74,25,+,=,99,64,34,98,63,36,99,+,+,=,=,71,28,99,52,46,98,+,+,=,=,50,45,31,22,+,=,=,+,72,76,再 见！,
