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1. 口算 8+2=

1. 口算 8+2=. 10. 10-3=. 7. 8-7=. 1. 6+4=. 10. 3+7=. 10-2=. 8. 7+1=. 8. 10. 4+3=. 7. 7. 10. 9. 连一连. 6+ 4. 5+ 4. 3+4. 乘车. 数学. 教学目标. 1 在具体的活动中，体会连加，连减，加减混合运算的意义。 2 能掌握连加，连减，加减混合的顺序，并进行正确计算。. 三个数连加或连减时，从左往右依次计算。. 试. 一. 试. 7 － 2 － 3 ＝. 5 ＋ 2 + 3 ＝.

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1. 口算 8+2=

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  1. 1.口算 8+2= 10 10-3= 7 8-7= 1 6+4= 10 3+7= 10-2= 8 7+1= 8 10 4+3= 7

  2. 7 10 9 连一连 6+4 5+4 3+4

  3. 乘车 数学 教学目标 1 在具体的活动中，体会连加，连减，加减混合运算的意义。 2 能掌握连加，连减，加减混合的顺序，并进行正确计算。

  4. 三个数连加或连减时，从左往右依次计算。

  5. 试 一 试 7 － 2 － 3 ＝ 5 ＋ 2 + 3 ＝ 6 ＋ 1 - 5 ＝ 8 － 3 ＋ 4 ＝

  6. 5 + 2 + 1 = 8 7 7

  7. 想一想 ？ 9 只 - - 9 4 2 = 3 怎么算？ 5

  8. ? 2 + 3 + 5 = 练一练 10

  9. ？ 10 - 3 - 3 = 4

  10. 7+2+1= 9-6-3= 3+3-2= 10-6+2= 8+1-0= 10-4+3= 9+0-3= 4+2-4= 0+2+7= 10-5-2= 10 0 知识达标 4 6 看 谁 算 得 又 对 又 快 9 9 6 2 9 3

  11. 总结 掌握连加,连减式题的运算顺序，并能正确计算。

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