《求加法算式中的未知数》（课件）苏教版一年级数学上册

求加法算式中的未知数 10－ 5 = 5 9－5 = 4 2＋8 = 10 6 ＋ 4 = 10 6 － 6 = 0 9＋1 = 10 3＋2 = 5 4 ＋ 4 = 8 10－2 = 8 5＋0 = 5 8－3 = 5 4＋5 = 9 复习导入 8＋（ ）= 10 （ ） 再放几个是10个？ 10 8 2 10－8=2 你是怎样想的？ 2 盒子里已经放的苹果个数 还要再放几个 两部分合起来是10个 1. 5＋（ ）= 8 （ ）＋ 6= 10 7＋（ ）= 8 3＋（ ）= 9 3 4 1 6 8 5 3 8－5=3 10 6 4 10－6=4 我们可以用什么方法来求这里的未知数呢？ 求加法算式中的未知数 2.看算式，画画填填。 9＋（ ）= 10 1 3＋（ ）= 10 5＋（ ）= 9 7 4 3. 3 6 5 1 5 6 1 3 （ ）＋9 = 10 2＋（ ）= 10 8 （ ）＋3 = 7 4 1 4＋（ ）= 9 5 4. 5. ＋ = 10 1 3 5 7 9 9 7 5 3 1 5. 4＋5 ＜ ＞ ＜ ＝ ＜ ＜ 6.在 里填“＞”“＜”或“＝”。 9 7 5 6 3＋7 10 7 6 5 9－4 9－3 9 5 10 6 回顾小结 小朋友们，今天我们一起学习了求加法算式中的未知数，你有哪些收获呢？ D1 com.apple.VoiceMemos (bethanylemon (null)) 2A com.apple.VoiceMemos (bethanylemon (null)) 3B com.apple.VoiceMemos (bethanylemon (null)) 4A com.apple.VoiceMemos (bethanylemon (null)) 5B com.apple.VoiceMemos (bethanylemon (null)) 6B com.apple.VoiceMemos (bethanylemon (null)) D2 com.apple.VoiceMemos (bethanylemon (null)) D3 com.apple.VoiceMemos (bethanylemon (null)) D4 com.apple.VoiceMemos (bethanylemon (null)) 1A com.apple.VoiceMemos (bethanylemon (null)) D7 com.apple.VoiceMemos (bethanylemon (null)) D8 com.apple.VoiceMemos (bethanylemon (null)) 11B com.apple.VoiceMemos (bethanylemon (null)) D6 com.apple.VoiceMemos (bethanylemon (null)) D9 com.apple.VoiceMemos (bethanylemon (null)) D11 com.apple.VoiceMemos (bethanylemon (null)) D12 com.apple.VoiceMemos (bethanylemon (null)) D10 com.apple.VoiceMemos (bethanylemon (null)) 10C com.apple.VoiceMemos (bethanylemon (null)) D14 com.apple.VoiceMemos (bethanylemon (null)) D15 com.apple.VoiceMemos (bethanylemon (null)) D13 com.apple.VoiceMemos (bethanylemon (null)) D17 com.apple.VoiceMemos (bethanylemon (null)) D18 com.apple.VoiceMemos (bethanylemon (null)) D16 com.apple.VoiceMemos (bethanylemon (null)) 送信 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) D19 com.apple.VoiceMemos (bethanylemon (null)) D23 com.apple.VoiceMemos (bethanylemon (null)) D24 com.apple.VoiceMemos (bethanylemon (null)) D20 com.a