<?php $z = '0.00';?>
1[{echo -$z}] 2[{echo $z * -1}] 3[{echo -0.4 | round}] 4[{echo $z | * -1}] 5[{echo 0 - $z}] 6[{echo php:round(-0.4)}] 7[{echo $z / -1}] 8[{echo -0.04 | round(@, 1)}] 9[{echo $z * -1 . ''}] 10[{echo 0.5 * -1}]