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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,20 以 内 的 退 位 减 法,-十 几 减 9、8、7、6,9+5=8+3=7+6=,9+8=6+5=9+6=,11,13,17,11,15,口算,14,9+()=11 9+()=14,8+()=12 8+()=15,7+()=13 6+()=11,5,4,7,6,5,填空,2,还剩多少个?,摆一摆,算一算,15-8=,7,说一说,算一算,13-7=,11-6=,6,5,167,8,3,7,5,2,4,6,159,139,179,127,118,119,136,9,11-9=,16-7=,11-6=,2,9,5,15-8,=,7,14-9=,5,13-8=,5,12-6=,6,17-9=,8,11 9=,12 9=,13 9=,14 9=,15 9=,16 9=,17 9=,18 9=,你发现了什么?,2,3,4,5,6,7,8,9,1,1,9,=,2,1,2,9=,3,1,3,9=,4,1,4,9=,5,1,5,9=,6,1,6,9=,7,1,7,9=,8,1,8,9=,9,。,11 8=,12 8=,13 8=,14 8=,15 8=,16 8=,17 8=,你发现了什么?,3,4,5,6,7,8,9,1,1,8,=,3,1,2,8=,4,1,3,8=,5,1,4,8=,6,1,5,8=,7,1,6,8=,8,。,11 7=,12 7=,13 7=,14 7=,15 7=,16 7=,你发现了什么?,4,5,6,7,8,9,1,1,7,=,4,1,2,7=,5,1,3,7=,6,1,4,7=,7,1,5,7=,8,1,6,7=,9,。,11 6=,12 6=,13 6=,14 6=,15 6=,你发现了什么?,5,6,7,8,9,1,1,6,=,5,1,2,6=,6,1,3,6=,7,1,4,6=,8,1,5,6=,9,。,11 8=,13 7=,13 6=,18 9=,15 8=,17 9=,11 7=,14 6=,3,6,7,9,7,8,4,8,15 9=,12 7=,13 9=,15 7=,11 6=,16 9=,17 8=,14 8=,6,5,4,8,5,7,9,6,9,5,8,2,6,15 6 13 8 14 7,17 9 11 9 12 6,7,送信,11-()=5 12-()=5,13-()=4 12-()=4,18-()=9 15-()=7,7,9,8,9,8,填空,6,你收获了什么?,谢谢,
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