一年级数学上册第3单元1_5的认识和加减法《减法》优选作业新人教版.docx

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1减法一、填空题1.看图填得数2.看图写算式3.比一比,算一算4.填一填5.算一算,看谁摘的星星多。二、简答题比一比,谁是列式小能手。2三、应用题1.有 5 只鸭子在池塘中游泳,后来有 1 只离开了,现在池塘中还剩几只鸭子?2.小河里有 4 条鱼,游走了 1 条,还剩几条?参考答案一、填空题31. 2 4 3 2. 4-2=2 5-1=4 4-1=33. 5 1 5 3 2 1 3 2 4. 4 3 2 1 1 2 35. 1 3 3 1 1 2二、简答题树上有 4 只鸟,飞走了 2 只,还剩 2 只。4-2=2。树上有 5 个苹果,小猴子摘走了 2 个,还剩 3 个。5-2=3。树上有 1 只猴子,树下有 2 只猴子,一共有 3 只猴子。1+2=3。树上原来有 3 只猴子,跑下树了 2 只,树上还剩 1 只猴子。3-2=1三、应用题1.5-1=42.4-1=3

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