以内数的排列.pptx

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,*,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以内数旳排列,数射线,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,16,13,数射线,0,1,2,5,10,15,20,4,7,12,18,3,6,8,11,13,在数射线上找数宝宝,9,14,16,17,19,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,13,16,按规律揭数,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,13,16,双数：2,4,6,8,10,12,14,16,18,20,0，,单数：1,3,5,7,9,11,13,15,17,19,猜数游戏,0,1,2,5,10,15,20,4,7,12,14,17,18,19,3,6,8,9,11,16,13,1）比10小2旳数是几？,10-2=8,2）比10大9旳数是几？,10+9=19,3）比18大10旳数是几？,18-10=8,4）比20小10旳数是几？,20-10=10,找规律,5 7 9 ()(),11,13,()()14 16 18,10,12,1 4 7 ()(),10,13,0 5 10 ()(),15,20,1 20 2 19 ()(),18,3,今日你学了什么？,