我对Mafnah的答案进行了投票，但再看一遍，如果你保持默认的边际，我建议下面的答案更好。

<div class="equal row-fluid">
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
    <div class="span2"></div>
</div>

.equal .span2 {
    width: 17.9%;
}

五列显然不是bootstrap设计的一部分。

但是对于Bootstrap v4 (alpha)，有两件事可以帮助处理复杂的网格布局

Flex (http://v4-alpha.getbootstrap.com/getting-started/flexbox/)，新的元素类型(官方- https://www.w3.org/TR/css-flexbox-1/) 响应式实用程序(http://v4-alpha.getbootstrap.com/layout/responsive-utilities/)

简单来说，我在用

<style>
.flexc { display: flex; align-items: center; padding: 0; justify-content: center; }
.flexc a { display: block; flex: auto; text-align: center; flex-basis: 0; }
</style>
<div class="container flexc hidden-sm-down">
  <!-- content to show in MD and larger viewport -->
  <a href="#">Link/Col 1</a>
  <a href="#">Link/Col 2</a>
  <a href="#">Link/Col 3</a>
  <a href="#">Link/Col 4</a>
  <a href="#">Link/Col 5</a>
</div>
<div class="container hidden-md-up">
  <!-- content to show in SM and smaller viewport, I don't think 5 cols in smaller viewport are gonna be alright :) -->
</div>

不管是5 7 9 11 13还是其他概率，都没问题。 我非常确定12网格标准能够服务于90%以上的用例——所以让我们以这种方式设计——也更容易开发!

flex教程在这里“https://css-tricks.com/snippets/css/a-guide-to-flexbox/”

引导4，每行可变列数

如果你想每行最多有5列，这样每一行的列数仍然只占一行的1/5，解决方案是使用Bootstrap 4的mixins:

SCSS:

.col-2-4 {
    @include make-col-ready(); // apply standard column margins, padding, etc.
    @include make-col(2.4); // 12/5 = 2.4
}
.col-sm-2-4 {
    @include make-col-ready();
    @include media-breakpoint-up(sm) {
        @include make-col(2.4);
    }
}
.col-md-2-4 {
    @include make-col-ready();
    @include media-breakpoint-up(md) {
        @include make-col(2.4);
    }
}
.col-lg-2-4 {
    @include make-col-ready();
    @include media-breakpoint-up(lg) {
        @include make-col(2.4);
    }
}
.col-xl-2-4 {
    @include make-col-ready();
    @include media-breakpoint-up(xl) {
        @include make-col(2.4);
    }
}

HTML:

<div class="container">    
  <div class="row">
    <div class="col-12 col-sm-2-4">1 of 5</div>
    <div class="col-12 col-sm-2-4">2 of 5</div>
    <div class="col-12 col-sm-2-4">3 of 5</div>
    <div class="col-12 col-sm-2-4">4 of 5</div>
    <div class="col-12 col-sm-2-4">5 of 5</div>
  </div>
  <div class="row">
    <div class="col-12 col-sm-2-4">1 of 2</div> <!-- same width as column "1 of 5" above -->
    <div class="col-12 col-sm-2-4">2 of 2</div> <!-- same width as column "2 of 5" above -->
  </div>
</div>

Bootstrap默认可以缩放到12列?这意味着如果我们想要创建一个宽度相同的12列布局，我们将在div class="col-md-1"中写入12次。

<div class="row">
<div class="col-md-1"></div>    
<div class="col-md-2">1</div>
<div class="col-md-2">2</div>
<div class="col-md-2">3</div>
<div class="col-md-2">4</div>
<div class="col-md-2">5</div>
<div class="col-md-1"></div>
</div>

最好的方法

只在行中添加.row-cols-5类。每一行有5个div。

<div class="container-fluid">
    <div class="row row-cols-5">
        <div class="col">1</div>
        <div class="col">2</div>
        <div class="col">3</div>
        <div class="col">4</div>
        <div class="col">5</div>
        <div class="col">6</div>
        <div class="col">7</div>
        <div class="col">8</div>
        <div class="col">9</div>
        <div class="col">10</div>
    </div>
</div>

使用响应式.row-cols-*类快速设置最能呈现内容和布局的列数。普通的.col-*类应用于单个列(例如，.col-md-4)，而行列类在父.row上设置为快捷方式。

row-cols - * row-cols-sm - * row-cols-md - * row-cols-lg - * row-cols-xl - *

你也可以使用附带的Sass mixin, row-cols():

.element {
  // Three columns to start
  @include row-cols(3);

  // Five columns from medium breakpoint up
  @include media-breakpoint-up(md) {
    @include row-cols(5);
  }
}

在bootstrap 3中，我认为我们可以这样做，删除左右边距:

<div class="row this_row">
    <div class="col-md-2 col-md-offset-1"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
    <div class="col-md-2"></div>
</div>

和CSS

.this_row {
    margin: 0 -5%;
}