Teng's friend says that his fourth-grade daughter feels as if she is getting dumber and dumber. He says: "If they are in fourth grade and still feel that such calculations are beyond them, no wonder they lose interest in math."
朋友的四年級女兒覺得自己越學越笨，「到了小學四年級，這些計算仍不能得心應手，難怪會覺得數學無趣，自己笨，」他說。