二级数学下册 五 加与减 5小蝌蚪的成长课件 北师大

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,2021/2/8,#,问题,探究,练习,拓展,412,89,412,89,323,只,412,80,332,332,9,323,80,323,332,9,412,412,89,3,2,12,10,3,答：东池塘有,323,只蝌蚪没有变成青蛙。,514,126,514,126,388,只,514,100,414,414,20,394,514,126,8,8,14,10,3,答：西池塘有,388,只蝌蚪没有变成青蛙。,100,6,388,394,414,20,514,394,6,388,5,8,4,0,473,40,6,467,467,432,200,70,8,362,354,354,215-78=137,（页）,300,76,224,个,300,70,230,230,6,224,300,76,4,2,10,10,2,答：没吹好的还有,224,个。,210331900,36145138229,-,-_,8965193671,200-178=23,元,（,1,）够坐,（,2,）,203+278=481,人,（,3,）座位够,500-481=19,你学到了,什,什么？,