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--- 加号

1. 2. +. 1. =3. --- 加号. 读作： 2 加 1 等于 3 。. 2. 3+2=5. 从 3 起接着数： 4 、 5 。. 3. 2. 5. 练一练. 1+3=4. 课堂活动. 1 、 说一说，填一填。. 3. 4. 2. 3. 5. 1 + =. + =. 2 、 画一画，算一算。. 4. 3. 5. 3 + 1 =. 2 + 1 =. 2 + 3 =. 1. 看图填空。. +. 2. 3. =. 5. 2. 说一说，填一填。. 3. +. 0. =. 3.

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--- 加号

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  1. 1 2 + 1 =3 ---加号 读作：2加1等于3。

  2. 2 3+2=5 从3起接着数：4、5。 3 2 5

  3. 练一练 1+3=4

  4. 课堂活动 1、说一说，填一填。 3 4 2 3 5 1 + = + =

  5. 2、画一画，算一算。 4 3 5 3 + 1 = 2 + 1 = 2 + 3 =

  6. 1.看图填空。 + 2 3 = 5 2.说一说，填一填。 3 + 0 = 3 1 4 5 + = + 0 3 = 3 4 1 + = 5

  7. 3.看图填算式。 4 3+1= （1） 4 1+3= （2） 2 + 3 5 = 3 + 2 = 5

  8. 4.用小棒摆一摆，填一填。 4 1 3 + = 3 1 2 2

  9. 算一算 2 3 1+1= 2+1= 3+2= 2+2= 1+4= 3+1= 5 4 5 4

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