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,20,以内的退位减法,练习乐园,你说我讲,复习巩固,动脑筋,复习:,9+2=8+6=7+4=,6+5=5+9=4+7=,8+5=7+5=8+3=,9+5=7+8=5+7=,11,14,11,11,14,11,13,12,11,14,15,12,?朵,10+5=15,(朵),把,9,分成,6,和,3,,,16,6=10,,,10,3=7,。,16,9=7,从,10,里面减去,9,,,10,9=1,,,1+6=7,。,16,9=7,一个一个地减,16,9=7,做一做,?,个,12,个,?只,11,只,12,8=4,(个,),11,4=7,(只),计算,12-5=11+0=12-3=,14+4=10-6=11-5=,10-4=13-7=6+9=,13-9=11-9=12-0=,7,11,9,18,4,6,6,6,15,4,2,12,13-5,小鸡回家,8,6,3,14-9,11-8,5,15-9,