一年级下册新苏教版数学精品《20以内的退位减法复习》ppt课件
一年级下册新苏教版数学精品《20以内的退位减法复习》ppt课件第3页

11-9

11-8

11-7

11-6

11-5

11-4

11-3

11-2

12-9

12-8

12-7

12-6

12-5

12-4

12-3

11

11

11

11

11

11

11

11

=2

=3

=4

=5

=6

=7

=8

=9