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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,万以内数的加法和减法(一),整理,和,复习,52,35,23,69,86,34,62,18,87,92,52,44,650,340,6 5 0,3 4 0,990,9,0,先口算 再笔算,650,340,65,34,99,990,9,730,480,7 3 0,4 8 0,1210,1,0,先口算 再笔算,730,480,73,48,121,1210,2,1,1,1,750,540,7 5 0,5 4 0,210,1,0,先口算 再笔算,750,540,75,54,21,210,2,840,560,8 4 0,5 6 0,280,8,0,先口算 再笔算,840,560,84,56,28,280,2,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,170,150,320,(,个,),320,219,392,(,220,),(,390,),610,(,根,),620,528,184,(,530,),(,180,),350,(,瓶,),350,468,405,(,470,),(,410,),60,(,米,),197,201,398,(,人,),400,398,答:够。,
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