<div>
<table border="1px">
<tr>
<td width="100px" style="width: 100px !important;">1000800</td>
<td>1000000</td>
<td>1000000</td>
</tr>
<tr>
<td>1000000</td>
<td>10000300</td>
<td>1000000</td>
</tr>
</table>
</div>
<table border="1px">
<tr>
<td width="100px">1000000</td>
<td>1000000</td>
<td>1000000</td>
</tr>
<tr>
<td>1000000</td>
<td>10000300</td>
<td>1000000</td>
</tr>
</table>
* {margin: 0; padding: 0;}
.div1 {position: relative; width: 150px; height: 100px; overflow: scroll; border: 1px solid red;}

<td width="100px" style="width: 100px !important;">1000800</td>

<td><div>1000800</div></td>

td div {
width:100px;
}