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数学广角

数学广角. 例 2. ? 个. 16. 做一做. ? 只羊. 做一做. 16 只羊. 3 、 6 根胡萝卜换 2 个大萝卜 , 9 个大萝卜换 3 棵大白菜。 6 棵大白菜换 ? 根胡萝卜。. 胡萝卜 大萝卜 大白菜. 换 2. 9 换 3. ? 换 6. 胡萝卜 大萝卜 大白菜. 6 换 2. 3 换 1. 27 换. 9 换 3. ? 换 6.

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数学广角

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  1. 数学广角

  2. 例2

  3. ?个

  4. 16

  5. 做一做 ?只羊

  6. 做一做 16只羊

  7. 3、6根胡萝卜换2个大萝卜, 9个大萝卜换3棵大白菜。 6棵大白菜换?根胡萝卜。 胡萝卜 大萝卜 大白菜 • 换 2 9 换 3 ? 换 6

  8. 胡萝卜 大萝卜 大白菜 6 换 2 3 换 1 27 换 9 换 3 ? 换 6

  9. 胡萝卜 大萝卜 大白菜 6 换 2 3 换 1 27 换 9 换 3 54 换 6

  10. 4、1只鸡和1只鸭，谁重一些？

  11. 鸭 鹅 鸡 2 ＝ 1 4 ＝ 2 > 4 2 > 4 1 > 1

  12. 5、求出 所代表的数。 • + =240 = + + = ? = ?

  13. 因为 = + + + =240 所以 + + + =240 =60 =180

  14. 你今天有什么收获?

  15. 思考? (2) + =91 + =63 + =46 =? =? =?

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