Common Missing WordPress Image Positioning CSS

img.aligncenter {
display: block;
margin-left: auto;
margin-right: auto;
}
img.alignright {
padding: 4px;
margin: 0 0 2px 7px;
display: inline;
}
img.alignleft {
padding: 4px;
margin: 0 7px 2px 0;
display: inline;
}
.alignright {
float: right;
}
.alignleft {
float: left;
}