It's not necessary. According to the official account of WeChat, a fun mathematical WeChat, primary school students can significantly improve their grades in a short time by practicing addition, subtraction, multiplication and division, which is the basic skill of test scores. This kind of mechanical training without mathematical connotation can improve one's math scores, at the cost of making students feel the most boring side of mathematics and reducing their interest in mathematics, which leads to the lack of stamina in math learning, which is not worth the candle.