\[\boxed{\mathbf{401.}}\]
\[1)\ 429 \approx 430\]
\[231 \approx 230\]
\[547 \approx 550\]
\[713 \approx 710\]
\[2)\ 390 \approx 400\]
\[143 \approx 100\]
\[485 \approx 500\]
\[629 \approx 600\]