2018-2019学年一年级数学上册 第十单元《20以内的进位加法》课时2 8、7加几教学课件 苏教版.ppt
,8、7加几,1,4,14,9 + 5 = 9 + 4 = 9 + 7 = 9 + 9 =,9 + 2 = 9 + 8 = 9 + 3 = 9 + 6 =,14 13 16 18,11 17 12 15,用小棒摆一摆,说说是怎样想的。,2,5,8 + 7 =,10,15,5,3,8 + 7 =,10,15,3,6,7 + 9 =,16,9 + 7 = 7 + 9 =,16,16,10,11,13,2,2,12,10,2,6,16,10,3,1,11,10,15,12,14,17,13,14,17,17,15,15,16,16,凑十法, 圈一圈 分一分 凑成十 算得数,