课件19张PPT。十几减8、7、6 破十法儿歌 退位减,我会算
十几减9,是几加1,
十几减8,是几加2,
十几减7,是几加3,
十几减6,是几加4,
十几减5,是几加5。11 - 9 = 12 - 9 = 13 - 9 = 14 - 9 = 15 - 9 = 16 - 9 = 17 - 9 = 18 - 9 = 你发现了什么?2345678911 - 9 = 2
12 - 9 = 3
13 - 9 = 4
14 - 9 = 5
15 - 9 = 6
16 - 9 = 7
17 - 9 = 8
18 - 9 = 9十几减9,是几加111 - 8 = 12 - 8 = 13 - 8 = 14 - 8 = 15 - 8 = 16 - 8 = 17 - 8 = 你发现了什么?345678911 - 8 = 3
12 - 8 = 4
13 - 8 = 5
14 - 8 = 6
15 - 8 = 7
16 - 8 = 8
十几减8,是几加211 - 7 = 12 - 7 = 13 - 7 = 14 - 7 = 15 - 7 = 16 - 7 = 你发现了什么?45678911 - 7 = 4
12 - 7 = 5
13 - 7 = 6
14 - 7 = 7
15 - 7 = 8
16 - 7 = 9
十几减7,是几加311 - 6 = 12 - 6 = 13 - 6 = 14 - 6 = 15 - 6 = 你发现了什么?5678911 - 6 = 5
12 - 6 = 6
13 - 6 = 7
14 - 6 = 8
15 - 6 = 9
十几减6,是几加411 - 8 = 13 - 7 = 13 - 6 = 18 - 9 = 15 - 8 = 17 - 9 = 11 - 7 = 14 - 6 = 3679784815 - 9 = 12 - 7 = 13 - 9 = 15 - 7 = 11 - 6 = 16 - 9 = 17 - 8 = 14 - 8 = 6548579615 – 9 = 6
16 – 8 = 8
14 – 7 = 7
14 – 6 = 8
18 – 6 = 12
17 – 4 = 13
16 – 4 = 12
15 – 1 = 14
个位能够减,不用退位减个位不够减,要用退位减9582615– 6 13– 8 14 – 7
17 – 9 11– 9 12 – 6 7送信连线