课件20张PPT。20以内的退位减法你说我讲6先拿走5个。再拿走4个。还剩几个气球?= (个)1798-9比一比(在○里填>、<或=)
15 - 9○9 12-9○3
5○11-9 7○18-9
9 + 0○9-0 6○13-9
4+3 ○17-9 7+9○5+6><=><=<>11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9 你说我讲715可以分成10和5。
10 -8 =2
2 +5 =7= (个)1679-你说我讲86 + 8 =14
14 -6 =810 - 6 =4
4 + 4=8小新还剩几条鱼?= (个)1239-===6511+1165-1156-1、
8+4= 8 +6 = 7 +4 = 7 +7 =
12-8 = 14-8 = 11-7 = 14- 7 =1214111446472、?个12个= (个)1275-= (个)1789-?个17个谢谢观赏