万以内数的加法和减法（一）的整理和复习.ppt

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。,