20以内的进位加法教学提纲.ppt

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,20以内的进位加法,1,9,加 几,踢毽的和跳远的一共有多少人,?,现在有多,少盒,?,先放进,1,盒凑成,10,10+3,得,13,。,你喜欢哪一种方法,?,1,2,3,12,13,一共有,13,盒。,9,10,11,12,13,一共有,13,盒。,摆一摆，算一算。,2,9 +3 =,10,1,2,12,10,9 +7 =,1,6,16,1.,圈一圈，算一算。,9+5=,14,9+6=,15,1.,圈一圈，算一算。,2.,9 +=,9 +=,3.,9+5=,9+4=,9+7=,9+2=,9+8=,9+3=,9+9=,9+6=,14,13,16,11,17,12,18,15,1.,+=,9,7,16,2.,9+,2=,6=,4=,8=,9+,5=,3=,9=,7=,11,15,13,17,14,12,18,16,3.,+=,9,3,12,+=,9,8,17,4.,+=,9,5,14,?,个,5.,+=,9,6,15,6.,9+3,9+6,9+1,9+2,10,11,12,15,9+8,9+4,9+7,9+9,13,16,17,18,7.,6+3=,9+7=,1+9=,9+5=,5+5=,9+8=,2+5=,9+9=,9+6=,9,16,10,14,10,17,7,18,15,一共有,(),人。,3,乐队有,5,人。,9+5=,(,人,),9+5=,(,人,),可以把,9,凑成,10,。,10,9 +5 =,1,4,14,10,9 +5 =,4,5,14,还可以把,5,凑成,10,。,14,一共有多少个南瓜,?,+=,(,个,),9,6,15,1.,现在有几只,?,+=,(,只,),9,3,12,又来了,3,只。,2.,先说得数，再写算式。,9+,7,9,3,6,8,5,2,4,3.,10,-,8=,9+5=,9+3=,8,-,6=,9,-,7=,9+7=,10,-,3=,9+8=,7,-,4=,2,14,12,2,2,16,7,17,3,一共有多少人,?,9+5+1=15,(,人,),我前面有,9,人，,后面有,5,人。,1,8,、,7,、,6,加几,一共有,多少,人,?,9,10,11,8,加,5,等于,8 +5 =,10,5 +8 =,10,2,3,13,5,3,13,8,加,5,等于,2,想一想。,8+4=,7+6=,6+5=,12,13,11,8+9=,8 +9 =,10,2,7,17,8 +9 =,10,7,1,17,3,可以把,8,凑成,10,。,可以把,9,凑成,10,。,9+8=17,8+9=,17,8+9=,17,3,1.,圈一圈，算一算。,+=,1.,圈一圈，算一算。,+=,2.,10,7 +5 =,10,8 +6 =,3,2,12,2,4,14,3.,7+4=,8+7=,6+5=,7+7=,7+6=,8+3=,11,15,11,14,13,11,4.,7+8=,6+9=,7+9=,6+8=,6+7=,15,15,16,14,13,1.,8+,2=,4=,8=,6=,7+,3=,5=,9=,7=,10,12,16,14,10,12,16,14,2.,+=,3.,先说得数，再写算式。,8+,7,9,3,6,8,5,2,4,7+,8,6,9,7,5,4,6+,8,6,9,5,7,4.,?,个,=,7,个,7,5,+,12,5.,8+7=,6+5=,7+6=,7+8=,8+9=,7+4=,8+6=,7+7=,7+9=,15,11,13,15,17,11,14,14,16,6.,12,13,14,15,8+5,7+8,9+5,9+3,8+4,9+6,7+7,9+4,6+6,8+6,7.,8+4=,8+9=,9+7=,9+6=,8+3=,8+6=,8+7=,7+5=,8+8=,12,17,16,15,11,14,15,12,16,8.,?,只,=,8,7,+,15,+,=,(,只,),一共有多少只兔,?,8,7,15,4,1,2,3,15,一共,15,只。,10,只白兔,5,只灰兔。,10+5=,15,8+7=,=,(,只,),=,(,个,),7,+,3,10,9,-,3,6,+,=,(,只,),4,8,12,1.,有,(),只,母鸡。,一共有,(),只鸡。,有,(),只,公鸡。,8,4,12,2.,9+6=,7+5=,8+7=,7+8=,6+7=,9+4=,8+5=,10,-,3=,8+9=,15,12,15,15,13,13,13,7,17,3.,=,(,条,),有,(,),条鱼，,游走,(),条。,10,4,还有几条,?,10,-,4,6,4.,=,(,人,),一共有多少人,?,水里有,8,人。,8,+,6,14,5.,8+,(,),=12,7+,(,),=13,9+,(,),=16,4,6,7,9+,(,),=15,8+,(,),=11,7+,(,),=14,6,3,7,复 习,9+5=,9+4=,9+3=,9+2=,8+5=,8+4=,14,13,12,11,13,12,8+3=,7+5=,11,12,1,5+7=,5+8=,5,、,4,、,3,、,2,加几,怎样想能很快说出得数,?,12,13,2,4+8=,3+9=,12,12,1.,=,5,+,6,11,=,4,+,7,11,2.7+5=,5+7=,12,14,12,14,9+5=,5+9=,3.9+4=,4+9=,13,11,13,11,8+3=,3+8=,11,11,9+2=,2+9=,+7,4,6,3,5,7,1.,先说得数，再写算式。,+9,4,5,2,3,+8,3,4,5,2.,看谁算得又对又快。,5+7=,13,-,3=,2+9=,4+9=,12,10,11,13,10,-,7=,5+9=,3+8=,3+9=,4+8=,10,-,9=,4+7=,5+8=,3,14,11,12,12,1,11,13,3.,在 里填上“,”“,”或“,=,”,。,8+4 13,5+7 14,7+9 16,6+5 12,=,7+6 12,3+8 11,=,一班有,二班有,一共有,7,个,6,个,_,个,5,个,8,个,_,个,4,条,7,条,_,条,4.,算一算每一种体育用品有多少,?,13,13,11,整 理 和 复 习,9,+,9,9,+,8,8,+,9,9,+,7,8,+,8,7,+,9,9,+,6,8,+,7,7,+,8,6,+,9,9,+,5,8,+,6,7,+,7,6,+,8,5,+,9,2,+,9,9,+,2,8,+,3,7,+,4,6,+,5,5,+,6,3,+,8,4,+,7,9,+,4,8,+,5,7,+,6,6,+,7,5,+,8,4,+,9,9,+,3,8,+,4,7,+,5,6,+,6,5,+,7,4,+,8,3,+,9,20,以内进位加法表,在,20,以内进位加法表中，,(,1,),竖着看，各列是怎样排列的,?,(,2,),横着看，各行是怎样排列的,?,(,3,),你还发现什么有规律的排列,?,(,4,),这些题你是怎样算的,?,找得数是,13,的卡片。,1.,把和是,11,，,12,，,13,，,的加法算式一组一组地,说出来。,2.,用相同的时间，看谁算得又对又多。,8+6=,2+9=,7+5=,4+8=,10+4=,14,11,12,12,14,3+6=,4+7=,5+8=,3+7=,9+8=,9+7=,6+4=,8+3=,0+6=,5+10=,9,11,13,10,17,16,10,11,6,15,3.,5+8=,+,+,+,6,7,9,4,10,3,7+4=,+,+,+,8,3,6,5,9,2,(,1,),往下应该怎样画,?,(,2,),哪一行和其他三行的规律不同,?,6,7,8,9,10,4,5,6,7,8,2,4,6,8,10,1,2,3,4,5,此课件下载可自行编辑修改，仅供参考！感谢您的支持，我们努力做得更好！谢谢,