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余湾中心小学

减. 混. 合. 加. 余湾中心小学. 1. 口算. 4+5=. 8-2=. 8-4=. 10-5=. 8-5=. 7-5=. 6+3=. 3+4=. 6+4=. 9-6=. 8-6=. 7+3=. 2+7=. 4+5=. 5+3=. 8-7=. 0+8=. 6-4=. 7-4=. 10-3=. 5 个. 2. 看图写式. ? 个. 真棒！. 你能用个式子表示出来吗？. 2. 5. ( )+( )–( )=( ). 3. 4. 7. 5. 4 – 1 + 2 =. 你能用一个

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余湾中心小学

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  1. 减 混 合 加 余湾中心小学

  2. 1.口算 4+5= 8-2= 8-4= 10-5= 8-5= 7-5= 6+3= 3+4= 6+4= 9-6= 8-6= 7+3= 2+7= 4+5= 5+3= 8-7= 0+8= 6-4= 7-4= 10-3= 5个 2.看图写式 ?个

  3. 真棒！

  4. 你能用个式子表示出来吗？ 2 5 ( )+( )–( )=( ) 3 4 7

  5. 5 4 – 1 + 2 = 你能用一个 算式表示出来吗？ ３

  6. 2 + 6 – 3= 7 – 3 + 4= 8 – 4 + 2= 4 + 5 – 4= （ ） （ ） （ ）= 一、做一做 练习 8 5 8 4 6 5 4 9 二、看图写式 3 4 – 6 + 7

  7. 3 + 4 – = 5 9 – 5 + = 7 8 – + 3= 6 2 + + = 9 5 + – = 4 9 – + = 6 比一比，看谁做得最好 5 2 2 5 2 5 5 6 3

  8. 课堂作业： • 8－4－2 4+ 4+2 6－4+2 • 5+4－3 4+2－5 7+1－5 • 3+2－4 3+4－2 6+2－4

  9. 本课小结： 通过本课的学习，我们进一步认识了20以内 的加减法，能够进行简单的加减混合运算。同学 们，你们都学会了吗？你们今天有哪些收获？

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