tā / cóng / xiǎo / liàn / xí / xīn / suàn / xiàn / zài / suàn / zhàng / bǐ / jì / suàn / qì / hái / kuài

他从小练习心算，现在算账比计算器还快。

He has practiced mental arithmetic since childhood, and now he calculates bills faster than a calculator.