fā xiàn / dá àn / xiě cuò hòu / tā / ná chū / xiàng pí cā / bǎ / zhěng háng / shù zì / chóng xīn / gǎi le yí biàn

发现答案写错后，她拿出橡皮擦，把整行数字重新改了一遍。

After noticing that the answer was wrong, she took out an eraser and corrected the entire line of numbers.