一年级数学上册课件20以内的进位加法整理和复习1

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,*,*,人教新课标一年级数学上册,20,以内的进位加法,整理和复习,整理数学算式,6+9,5+9,4+9,3+9,2+9,9+4,8+5,7+7,6+6,3+8,9+5,8+3,7+4,6+9,5+9,4+9,3+9,2+9,9+4,8+5,7+7,6+6,3+8,9+5,8+3,7+4,横着看,竖着看,斜着看,6+5,你,说,我,说,6+5,6+6,6+7,6+8,6+9,5+6,5+7,5+8,5+9,4+7,4+8,4+9,3+8,3+9,2+9,9+2,9+3,9+4,9+5,9+6,9+7,9+8,9+9,8+3,8+4,8+5,8+6,8+7,8+8,8+9,7+4,7+5,7+7,7+8,7+9,7+6,竖着看：在排列上有什么规律,你,说,我,说,6+5,6+6,6+7,6+8,6+9,5+6,5+7,5+8,5+9,4+7,4+8,4+9,3+8,3+9,2+9,9+2,9+3,9+4,9+5,9+6,9+7,9+8,9+9,8+3,8+4,8+5,8+6,8+7,8+8,8+9,7+4,7+5,7+7,7+8,7+9,7+6,9,+,？,8,+,？,7,+,？,6,+,？,5,+,？,4,+,？,3,+,？,2,+,？,从左到右，各列是按照,你,说,我,说,6,+,5,6+,6,6,+,7,6,+,8,6,+,9,5,+,6,5,+,7,5,+,8,5,+,9,4,+,7,4,+,8,4,+,9,3,+8,3,+9,2,+,9,9,+2,9,+3,9,+4,9,+5,9,+6,9,+7,9,+8,9,+9,8,+,3,8,+,4,8,+,5,8,+,6,8,+,7,8,+,8,8,+,9,7,+,4,7,+,5,7,+,7,7,+,8,7,+,9,7,+,6,每一列的第一个加数都一样，第一列是,9,每一列的第二个加数都是从小到大排列。,你,说,我,说,6+5,6+6,6+7,6+8,6+9,5+6,5+7,5+8,5+9,4+7,4+8,4+9,3+8,3+9,2+9,9+2,9+3,9+4,9+5,9+6,9+7,9+8,9+9,8+3,8+4,8+5,8+6,8+7,8+8,8+9,7+4,7+5,7+7,7+8,7+9,7+6,横着看：在排列上有什么规律？,你,说,我,说,6+,5,6+,6,6+,7,6,+8,6,+9,5+,6,5+,7,5+,8,5,+9,4+,7,4+,8,4+,9,3+,8,3+,9,2+,9,9+,2,9+,3,9+,4,9,+5,9,+6,9+,7,9,+8,9+9,8+,3,8+,4,8+,5,8,+6,8,+7,8+,8,8,+9,7+,4,7+,5,7,+7,7,+8,7+,9,7+,6,每一横排第一个加数从大到小排列,每一横排第二个加数从小到大排列,你,说,我,说,6+5,6+6,6+7,6+8,6+9,5+6,5+7,5+8,5+9,4+7,4+8,4+9,3+8,3+9,2+9,9+2,9+3,9+4,9+5,9+6,9+7,9+8,9+9,8+3,8+4,8+5,8+6,8+7,8+8,8+9,7+4,7+5,7+7,7+8,7+9,7+6,11,12,13,14,15,16,17,18,各行算式的得数逐渐增大下边的一行比上边的一行大1,你,说,我,说,6,+,5,6+,6,6,+,7,6,+,8,6,+,9,5,+,6,5,+,7,5,+,8,5,+,9,4,+,7,4,+,8,4,+,9,3,+8,3,+9,2,+,9,9,+2,9,+3,9,+4,9,+5,9,+6,9,+7,9,+8,9,+9,8,+,3,8,+,4,8,+,5,8,+,6,8,+,7,8,+,8,8,+,9,7,+,4,7,+,5,7,+,7,7,+,8,7,+,9,7,+,6,斜着看：在排列上又有什么规律？,每一斜行第一个加数从小到大排列，第二个加数不变。,你,说,我,说,6+5,6+6,6+7,6+8,6+9,5+6,5+7,5+8,5+9,4+7,4+8,4+9,3+8,3+9,2+9,9+2,9+3,9+4,9+5,9+6,9+7,9+8,9+9,8+3,8+4,8+5,8+6,8+7,8+8,8+9,7+4,7+5,7+7,7+8,7+9,7+6,观察整个表，以,6+5,为界限，发现了什么规律？,左边和右边的题一样，只是两个加数位置变了，但和不变。,小结：,在加法表中有一条粗线把加法表分成两局部，只要记住左边的20道就可以了。,8 + 3 = 3 +,2 + 9 = 9 +,5 + 6 = 6 +,7 + 5 = 5 +,8 + 3 = 3 +,8,方法一,11,8 + 3 = 3 +,8,方法二,8 + 3 = 3 +,2 + 9 = 9 +,5 + 6 = 6 +,7 + 5 = 5 +,8,5,2,7,4 + = 9 +,6 + = 8 +,5,6,7,8,9,5,0,1,2,3,4,0,自己试一试！,把和是,11,、,12,、,13,的加法算式一组一组地说出来。,3 + 9 =,4 + 7 =,8 + 6 =,5 + 7 =,9 + 6 =,3 + 8 =,4 + 6 =,8 + 5 =,9 + 9 =,做一做,7 + 9 + 2=,4 + 8 + 2=,9 + 4 + 6=,3 + 6 + 5=,7 + 3 + 5=,8 + 4 + 5=,真棒,