十几减9、8、7、6退位减法
发布时间：2024-10-23
20 以 内 的 退 位 减 法---十 几 减 9、8、7、6
9+5= 14 8+3= 11 9+8= 17 6+5= 11
7+6= 13 9+6= 15
9+(2)=118+( 4)=12 7+(6 )=13
9+( 5)=148+(7 )=15 6+( 5)=11
还剩多少个？
摆一摆,算一算
15-8= 7
说一说,算一算
13-7= 6
11-6= 5
11-9 13-6 12-7
11-8 13—9
16-715-9
9
17-9
2 8 3
45
67
11-9= 2
13-8= 5
16-7= 9
14-9=5
12-6= 6
15-8= 7
11-6= 5
17-9= 8
你发现了什么？
11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9
11 - 9 = 2 12 - 9 = 3 13 - 9 = 4 14 - 9 = 5 15 - 9 = 6 16 - 9 = 7 17 - 9 = 8 18 - 9 = 9
你发现了什么？
11 - 8 = 3 12 - 8 = 4 13 - 8 = 5 14 - 8 = 6 15 - 8 = 7 16 - 8 = 8 17 - 8 = 9
11 - 8 = 3 12 - 8 = 4 13 - 8 = 5 14 - 8 = 6 15 - 8 = 7 16 - 8 = 8
你发现了什么？
11 - 7 = 4 12 - 7 = 5 13 - 7 = 6 14 - 7 = 7 15 - 7 = 8 16 - 7 = 9
11 - 7 = 4 12 - 7 = 5 13 - 7 = 6 14 - 7 = 7 15 - 7 = 8 16 - 7 = 9
你发现了什么？
11 - 6 = 5 12 - 6 = 6 13 - 6 = 7 14 - 6 = 8 15 - 6 = 9
11 - 6 = 5 12 - 6 = 6 13 - 6 = 7 14 - 6 = 8 15 - 6 = 9
十几减9、8、7、6退位减法.doc
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