认识10～20（第四课时）（课件）-2025-2026学年一年级上册数学西南大学版

认识10～20（第四课时） 1 一 复习旧知 1.我会算。 4+5= 3+7= 4+6= 10-7= 10-6= 10-1= 9 10 10 3 4 9 2 一 复习旧知 2.我会填。 10 3 10 6 13 16 9 10 19 12 10 2 17 10 7 14 10 4 3 二 探索新知 7 我们的在直尺上的位置在哪里？ 谁能帮我们回家呢？ 10 11 12 13 14 15 16 17 18 19 20 说一说。 4 二 探索新知 7 谢谢大家的帮助，我们回家啦！ 说一说。 5 11在10的（ ） 后面 比19多1的数是（ ） 20 大一些 20比18（ ） 20比3（ ） 大得多 同桌之间分别从尺子上选择一个数字， 然后告诉对方，并像这样互相说一说。 二 探索新知 7 说一说。 6 二 探索新知 1个十 5个一 （ ） 15 10+5=15 5+10=15 8 填一填，算一算。 7 二 探索新知 10+1=11 1+10=11 …… 你有什么发现？ 十加几就等于十几 几加十也等于十几 10 1 11 10+2=12 2+10=12 10 2 12 10+3=13 3+10=13 10 3 13 10+4=14 4+10=14 10 4 14 8 二 探索新知 18 1个十 8个一 8 填一填，算一算。 9 二 探索新知 18-8=10 18-10=8 10+5=15 5+10=15 数的组成 数的分解 8 10 二 探索新知 11-1=10 11-10=1 …… 你有什么发现？ 十几减几等于十 十几减十等于几 11 10 1 12-2=10 12-10=2 12 10 2 13-3=10 13-10=3 13 10 3 14-4=10 14-10=4 14 10 4 11 三 巩固练习，拓展提高 1. 找一找，说一说。 数学书的第13页。 第13页在第12页的后面，在第14页的前面。 同桌合作说一说。 12 三 巩固练习，拓展提高 2. 凑一凑，算一算。 我出6个一 我出1个十 10+6=16 6+10=16 16-6=10 16-10=6 16 13 四 回顾梳理，畅谈收获 通过这节课的学习， 你有哪些收获？ 14 谢谢观看 Thank you 1 com.apple.VoiceMemos (张谷慧的iPhone (null)) 2 com.apple.VoiceMemos (张谷慧的iPhone (null)) 3 com.apple.VoiceMemos (张谷慧的iPhone (null)) 4 com.apple.VoiceMemos (张谷慧的iPhone (null)) 7 com.apple.VoiceMemos (张谷慧的iPhone (null)) 8 com.apple.VoiceMemos (张谷慧的iPhone (null)) 9 com.apple.VoiceMemos (张谷慧的iPhone (null)) 5 com.apple.VoiceMemos (张谷慧的iPhone (null)) 6 com.apple.VoiceMemos (张谷慧的iPhone (null)) 10 com.apple.VoiceMemos (张谷慧的iPhone (null)) 11 com.apple.VoiceMemos (张谷慧的iPhone (null)) 12 com.apple.VoiceMemos (张谷慧的iPhone (null)) 13 com.apple.VoiceMemos (张谷慧的iPhone (null)) 14 com.apple.VoiceMemos (张谷慧的iPhone (null)) 15 com.apple.VoiceMemos (张谷慧的iPhone (null)) 16 com.apple.VoiceMemos (张谷慧的iPhone (null)) 17 com.apple.VoiceMemos (张谷慧的iPhone (null)) 20 com.apple.VoiceMemos (张谷慧的iPhone (null)) 18 com.apple.VoiceMemos (张谷慧的iPhone (null)) 19 com.apple.VoiceMemos (张谷慧的iPhone (null)) 21 com.apple.VoiceMemos (张谷慧的iPhone (null)) 22 com.apple.VoiceMemos (张谷慧的iPhone (null)) 23 com.apple.VoiceMemos (张谷慧的iPhone (null)) 24 com.apple.VoiceMemos (张谷慧的iPhone (null)) 25 com.apple.VoiceMemos (张谷慧的iPhone (null)) 26 com.apple.VoiceMemos (张谷慧的iPhone (null)) 27 com.apple.VoiceMemos (张谷慧的iPhone (null)) 30 com.apple.VoiceMemos (张谷慧的iPhone (null)) 28 com.apple.VoiceMemos (张谷慧的iPhone (null)) 29 com.apple.VoiceMemos (张谷慧的iPhone (null)) 33 com.apple.VoiceMemos (张谷慧的iPhone (null)) 31 com.apple.VoiceMemos (张谷慧的iPhone (null)) 32 com.apple.VoiceMemos (张谷慧的iPhone (null)) 37 com.apple.VoiceMemos (张谷慧的iPhone (null)) 38 com.apple.VoiceMemos (张谷慧的iPhone (null)) 34 com.apple.VoiceMemos (张谷慧的iPhone (null)) 35 com.apple.VoiceMemos (张谷慧的iPhone (null)) 36 com.apple.VoiceMemos (张谷慧的iPhone (null)) 40 com.apple.VoiceMemos (张谷慧的iPhone (null)) 41 com.apple.VoiceMemos (张谷慧的iPhone (null)) 42 com.apple.VoiceMemos (张谷慧的iPhone (null)) 39 com.apple.VoiceMemos (张谷慧的iPhone (null)) 43 com.apple.VoiceMemos (张谷慧的iPhone (null)) 44 com.apple.VoiceMemos (张谷慧的iPhone (null)) 45 com.apple.VoiceMemos (张谷慧的iPhone (null)) 48 com.apple.VoiceMemos (张谷慧的iPhone (null)) 49 com.apple.VoiceMemos (张谷慧的iPhone (null)) 46 com.apple.VoiceMemos (张谷慧的iPhone (null)) 47 com.apple.VoiceMemos (张谷慧的iPhone (null)) $