
$\left ( {1} \right )$$42\approx 40$
$109\approx 110$
$110\times 40=4400\left ( {元} \right )$
$\left ( {2} \right )$$109\times 42=4578\left ( {元} \right )$
$5600元\gt 4578元$
所以,采购员带$5600$元够
答:$\left ( {1} \right )$大约需要$4400$元;$\left ( {2} \right )$采购员带$5600$元够。
