北师大版 二年级下册 第五单元 加与减,41289,412,89,323,只,41280332,3329323,80,323,332,9,412,412,89,3,2,12,10,3,答：东池塘有323只蝌蚪没有变成青蛙。,514126,514,126,388,只,514100414,41420394,514,126,8,8,14,10,3,答：西池塘有388只蝌蚪没有变成青蛙。,100,6,388,394,414,20,514,3946388,5,8,4,0,473,40,6,467,467,432,200,70,8,362,354,354,300,76,224,个,30070230,2306224,300,76,4,2,10,10,2,答：没吹好的还有224个。,
