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把整数化成假分数

把整数化成假分数. 执教者：汤加萍. 7 4. 8 1. 20 5. 10 3. 12 4. 1 =. =. =. =. =……. 2. 3. 5. 4. 复习：下面的假分数哪些能化成整数？. 5 、把 1 化成分母分别是 2 、 3 、 4 、 5 的分数。. 2. 3. 4. 5. 6 3. 15 3. 3 3. 9 3. 1. 3. 4. 5. 0. 2. 15. 6. =. =. 3. 3. 2 =. 5 =. 3. 3.

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把整数化成假分数

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  1. 把整数化成假分数 执教者：汤加萍

  2. 7 4 8 1 20 5 10 3 12 4 1 = = = = =…… 2 3 5 4 复习：下面的假分数哪些能化成整数？ 5、把1化成分母分别是2、3、4、5的分数。 2 3 4 5

  3. 6 3 15 3 3 3 9 3 1 3 4 5 0 2 15 6 = = 3 3 2= 5= 3 3 6、把2和5分别化成分母是3的假分数。 整数（0除外）可以化成分母是任意整数（0除外）的假分数。 3x2 把整数（0除外）化成假分数，用指定的分母作分母，用分母和整数（0除外）的乘积作分子。 3x5

  4. 1= 2= 5= 1 1 1 想一想：怎样把1、2、和5分别化成分母是1的假分数？ 1 2 5

  5. （ ） （ ） 1＝ 4＝ 7 6 （ ） （ ） 8＝ 12＝ 1 3 把一个整数化成分母是1的假分数，假分数 的分子就是这个整数本身，所以整数都可以看成 分母是1的假分数. 7 24 6×4 3×12 8 36

  6. 1= 4= 8= 12= 7 6 1 3 1、把下面的整数按指定的分母化成假分数。 24 7 8 36

  7. 2 = = = = = 3 5 8 10 11 练习：在下面的括号填上适当的数。 10 22 6 16 20

  8. 把整数（0除外）化成假分数，用指定的分母作分母，用分母和整数（0除外）的乘积作分子。把整数（0除外）化成假分数，用指定的分母作分母，用分母和整数（0除外）的乘积作分子。

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