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万以内数的加法和减法(一),整理和复习,5235,2369,8634,6218,87,92,52,44,650340,6 5 0,3 4 0,990,9,0,先口算 再笔算,650340,653499,990,9,730480,7 3 0,4 8 0,1210,1,0,先口算 再笔算,730480,7348121,1210,2,1,1,1,750540,7 5 0,5 4 0,210,1,0,先口算 再笔算,750540,755421,210,2,840560,8 4 0,5 6 0,280,8,0,先口算 再笔算,840560,845628,280,2,大约是几百几十?,353,198,721,897,984,496,632,999,350,720,200,900,980,630,500,1000,382 246,693 381,504 198,486 315,(380),(250),630,(690),(380),310,(500),(200),700,(490),(320),170,估 算,170150320(个),320,219 392,(220),(390),610(根),620,528 184,(530),(180),350(瓶),350,468 405,(470),(410),60(米),197201,398(人),400398,答:够。,