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吃西瓜

吃西瓜. 5. 8. 他们一共吃了这个西瓜的几分之几？. +. +. 3. 3. 2. 2. =. =. +. 8. 8. 8. 1. 8. 大熊比小熊多吃了这个西瓜的几分之几？. -. -. 3. 3. 2. 2. =. =. -. 8. 8. 8. 8-5. 3. 8. 5. 5. 8. 8. 8. 8. 8. 还剩下这个西瓜的几分之几？. -. -. 1. -. =. =. =. 同分母分数相加减， 分母不变，分子相加、减。. 试一试. 小猪做计算. 1. 3. 6. 5.

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吃西瓜

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  1. 吃西瓜

  2. 5 8 他们一共吃了这个西瓜的几分之几？ + + 3 3 2 2 = = + 8 8 8

  3. 1 8 大熊比小熊多吃了这个西瓜的几分之几？ - - 3 3 2 2 = = - 8 8 8

  4. 8-5 3 8 5 5 8 8 8 8 8 还剩下这个西瓜的几分之几？ - - 1 - = = =

  5. 同分母分数相加减， 分母不变，分子相加、减。

  6. 试一试

  7. 小猪做计算

  8. 1 3 6 5 2 4 3 9 8 9 8 6 7 6 + = = + = 1 - - =

  9. 智力风帆

  10. 小伞兵 - +

  11. 11 19 1 5 6 2 1 1 = = 7 11 11 11 7 7 3 2 8 1 = 1 = 5 5 19

  12. 2 3 6 6 皮皮过生日， 妈妈吃了生日蛋糕的 ， 皮皮吃了生日蛋糕的 。

  13. 妈妈： 皮皮： 2 3 6 6 妈妈和皮皮一共吃了 生日蛋糕的几分之几？ 皮皮比妈妈多吃了 生日蛋糕的几分之几？

  14. 还剩下几分之几没有吃？

  15. 3 5 一根绳子用去了它的 还剩下几分之几？

  16. 谢谢 制作：棠下实验小学 李惠贞

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