Do this-
<TableRow
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<EditText
android:id="@+id/num1"
android:layout_width="fill_parent"
android:layout_height="50.0sp"
android:hint="@string/Numero1"
android:inputType="numberDecimal"
android:scrollHorizontally="true"
android:singleLine="true" />
<EditText
android:id="@+id/num2"
android:layout_width="fill_parent"
android:layout_height="50.0sp"
android:hint="@string/Numero2"
android:inputType="numberDecimal"
android:scrollHorizontally="true"
android:singleLine="true" />
</TableRow>
add "android:singleLine" attribute, this will keep your Edittext limited to one row only.