
11—9 = 2 1 12—9 = 15—9 = 6 5 16—9 = 13—9 = 14—9

11-9= 想:9加2得11,11减9得2.

2 11减几(2)

(人教新课标)一年级数学上册《67的分解与组成》教学课件.ppt

十几减9,8,7,6退位减法ppt
11—9 = 2 1 12—9 = 15—9 = 6 5 16—9 = 13—9 = 14—9
11-9= 想:9加2得11,11减9得2.
2 11减几(2)
(人教新课标)一年级数学上册《67的分解与组成》教学课件.ppt
十几减9,8,7,6退位减法ppt