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分数转换为小数复习

复习如何把分数转换为小数并做一些练习题.

分数转换为小数

把分数的分子除以分母就可以得到小数。

带分数的整数部分保留在小数点左边.

例 1: start fraction, 2, divided by, 5, end fraction

start fraction, start color #11accd, 2, end color #11accd, divided by, start color #1fab54, 5, end color #1fab54, end fraction, equals, start color #11accd, 2, end color #11accd, divided by, start color #1fab54, 5, end color #1fab54

$\begin{aligned} &~~ \, 0.{4} \\ \greenD5&\overline{\Big)\blueD2.0} \phantom{0000000}& \\ &\underline{\, \mbox{-}0}\,\,\,{\!\downarrow}&\\ &\phantom{0}{2\,\,0}& \\ &\underline{\, \mbox{-}2\,\,0}&\\ &\phantom{00}{\,\,0}&\\ \end{aligned}$

start fraction, start color #11accd, 2, end color #11accd, divided by, start color #1fab54, 5, end color #1fab54, end fraction, equals, 0, point, 4

例 2: 3, start fraction, 7, divided by, 8, end fraction

start color #f9685d, 3, end color #f9685d 保持在小数点左边.把 start color #11accd, 7, end color #11accd 除以 start color #1fab54, 8, end color #1fab54。

start fraction, start color #11accd, 7, end color #11accd, divided by, start color #1fab54, 8, end color #1fab54, end fraction, equals, start color #11accd, 7, end color #11accd, divided by, start color #1fab54, 8, end color #1fab54

$\begin{aligned} &~~ \, 0.{875} \\ \greenD8&\overline{\Big)\blueD7.000} \phantom{0000000}& \\ &\underline{\, \mbox{-}0}\,\,\,{\!\downarrow}&\\ &\phantom{0}{7\,\,0}& \\ &\underline{\, \mbox{-}6\,\,4}{\,\,\!\downarrow}&\\ &{\, \ \ \ \ \mbox{ }6\,0}&\\ &\underline{\, \ \ \ \ \mbox{ }5\,6\,\,}{\,\!\downarrow}&\\ &{\,\,\,\,\,\,\, \ \ \ \mbox{ }4\,0}&\\ &\underline{\, \ \ \ \ \ \ \ \mbox{ }4\,0}{}&\\ &\phantom{001}{\,\,\,\,\,\,\,\,0}&\\ \\ \end{aligned}$

start color #f9685d, 3, end color #f9685d, start fraction, start color #11accd, 7, end color #11accd, divided by, start color #1fab54, 8, end color #1fab54, end fraction, equals, 3, point, 875

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把 start fraction, 3, divided by, 10, end fraction 化成小数。

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五年级

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分数转换为小数复习

分数转换为小数

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