SOURCE

<div class="div1">1</div>
<div class="div2">2</div>
<div class="div3">3</div>

div{ 
  width:100px; 
  height:100px; 
  font-size:40px; 
  line-height:100px; 
  color:#fff; 
  text-align:center;
}

.div1{ 
  background:red; 
  margin:0 auto;
}

.div2{ 
  background: green; 
  float:left; 
  margin-left: 50%;
}

.div3{ 
  background: blue; 
  float:left; 
  margin-left: -200px;
}