《5432加几》20以内的进位加法PPT课件
复习:
9+5=14 9+3=12 8+5=13
7+6= 6+7= 8+4=12
6+9=15 7+8= 8+7=
新知学习:
5 + 7 = 7 + 5 =
5 + 8 = 8 + 5 =
4 + 8 = 8 + 4 =
3 + 9 = 9 + 3 =