Edit in JSFiddle

<table>
	<caption><strong><i>Colspan</i> ei ole olemas</strong></caption>
	<tr>
		<td>1</td>
		<!--Siia tekib nii-öelda tühi lahter-->
	</tr>
	<tr>
		<td>2</td>
		<td>3</td>
	</tr>
</table>

<br />

<table>
	<caption><strong><i>Colspan</i> olemas</strong></caption>
	<tr>
		<td colspan="2">1</td>
		<!--Siin ei tohi rohkem <td> elemente olla-->
	</tr>
	<tr>
		<td>2</td>
		<td>3</td>
	</tr>
</table>
table, tr, th, td{
    border: 1px solid black;
    padding: 10px;
}

table{
    border-collapse: collapse;
    width: 100%;
}