《练习八》（课件）苏教版一年级数学上册

练习八 10 7 3 10 3 7 = = = = 7 ＋ 3 10 3 ＋ 7 10 10 － 7 3 10 － 3 7 加法算式 减法算式 1. 2. 10－ 9 = 1 4＋5 = 9 9－5 = 4 4＋ 4 = 8 7－2 = 5 4＋6 = 10 10－1 = 9 1 ＋ 9 = 10 10－8 = 2 2 ＋ 8 = 10 10－7 = 3 5 ＋ 2 = 7 3. 第一关 8 ＋（ ）= 10 2 4. 6 ＋（ ）= 10 4 5 ＋（ ）= 8 3 7 ＋（ ）= 9 2 第二关 5. 第三关 5＋5 = 2＋ 9－3 = 3＋ 10－2 = 4＋ 3＋4 = ＋1 8 10 10 8 8 7 7 6 6 3 6 4 6. 8 6 4 2 0 7. ？块 ○ = 2 + 6 ？块 ○ = 3 + 7 8 10 8. 原来有10根木头， 大象搬走（ ）根， 还剩 根。 ○ ＝ 3 10 - 3 7 7 9. 4＋ = 5＋ 1 0 4＋ = 5＋ 2 1 4＋ = 5＋ 3 2 4＋ = 5＋ 4 3 4＋ = 5＋ 5 4 4＋ = 5＋ 6 5 6＋ = 7＋ 1 0 6＋ = 7＋ 2 1 6＋ = 7＋ 3 2 6＋ = 7＋ 4 3 8＋ = 9＋ 1 0 8＋ = 9＋ 2 1 得数是10的加法和10减几 求加法算式中的未知加数 回顾小结 考考你 小红和小组里的每一个同学都合 照一次像，一共照了9次。小组 里一共有（ ）人。 2B com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 3C com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 1A com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 7 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 8 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 9 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 10 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 11 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 12 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 4D com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 5 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 6 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 15 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 13 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 14 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 18 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 16 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 17 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A380)) 21 com.apple.VoiceMemos (iPhone Version 16.0.2 (Build 20A