Something like this should do it:
.column-left{ float: left; width: 33.333%; }
.column-right{ float: right; width: 33.333%; }
.column-center{ display: inline-block; width: 33.333%; }
EDIT
To do this with a larger number of columns you could build a very simple grid system. For example, something like this should work for a five column layout:
.column {
float: left;
position: relative;
width: 20%;
/*for demo purposes only */
background: #f2f2f2;
border: 1px solid #e6e6e6;
box-sizing: border-box;
}
.column-offset-1 {
left: 20%;
}
.column-offset-2 {
left: 40%;
}
.column-offset-3 {
left: 60%;
}
.column-offset-4 {
left: 80%;
}
.column-inset-1 {
left: -20%;
}
.column-inset-2 {
left: -40%;
}
.column-inset-3 {
left: -60%;
}
.column-inset-4 {
left: -80%;
}<div class="container">
<div class="column column-one column-offset-2">Column one</div>
<div class="column column-two column-inset-1">Column two</div>
<div class="column column-three column-offset-1">Column three</div>
<div class="column column-four column-inset-2">Column four</div>
<div class="column column-five">Column five</div>
</div>Or, if you are lucky enough to be able to support only modern browsers, you can use flexible boxes:
.container {
display: flex;
}
.column {
flex: 1;
/*for demo purposes only */
background: #f2f2f2;
border: 1px solid #e6e6e6;
box-sizing: border-box;
}
.column-one {
order: 3;
}
.column-two {
order: 1;
}
.column-three {
order: 4;
}
.column-four {
order: 2;
}
.column-five {
order: 5;
}<div class="container">
<div class="column column-one">Column one</div>
<div class="column column-two">Column two</div>
<div class="column column-three">Column three</div>
<div class="column column-four">Column four</div>
<div class="column column-five">Column five</div>
</div>